What is 261 factorial?

261! = 99968111967824017036.... It has 519 digits and 64 trailing zeros.

Calculate the factorial of 261 - Factorial Calculator

Quick Answer: 261! = 9996811196...0000
519 digits | 64 trailing zeros

Factorial Calculator Until 10,000

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261! Result

99968111967824017036...00000000

How 261! is calculated

The number of trailing zeros in 261! is 64.
The number of digits in 261 factorial is 519.
In scientific notation: 261! ≈ 9.996811 × 10⁵¹⁸
The factorial of 261 is calculated, through its definition, this way:
261! = 261 • 260 • 259 • 258 • 257 ... 3 • 2 • 1

Exact value of 261!

261! = 999681119678240170365666974242772379447964312352674306609929513362450035010339278239659603789887170991494853056775736636970001568849151879686033578459700752426142577883938773579988354556071377552677164940255584876307519980392816206656060678348449956011511060869911423343574880651150322775510875373332803568710161006563946527590233299291163538864355007730398951073154504630601037903476039415587909509342725660228364172944514223742794456098160400148557987840000000000000000000000000000000000000000000000000000000000000000

Nearby Factorials

n	n!	Digits	Trailing Zeros
256!	85781777...0000	507	63
257!	22045916...0000	510	63
258!	56878465...0000	512	63
259!	14731522...0000	515	63
260!	38301958...0000	517	64
261!	99968111...0000	519	64
262!	26191645...0000	522	64
263!	68884027...0000	524	64
264!	18185383...0000	527	64
265!	48191265...0000	529	65
266!	12818876...0000	532	65

More factorial calculations

Here you can find answers to questions like: Calculate the factorial of 261 What is the factorial of 261? What is the last digits of factorial of 261? How many trailing zeros in 261 factorial? How many digits are there in 261 factorial? Use the factorial calculator above to find the factorial of any natural between 0 and 10,000.

What is factorial?

Definition of factorial

The factorial is a quantity defined for any integer n greater than or equal to 0.

The factorial is the product of all integers less than or equal to n but greater than or equal to 1. The factorial value of 0 is, by definition, equal to 1. For negative integers, factorials are not defined. The factorial can be seen as the result of multiplying a sequence of descending natural numbers (such as 3 × 2 × 1).

The factorial symbol is the exclamation mark (!).

The factorial formula

If n is a natural number greater than or equal to 1, then

n! = n x (n - 1) x (n - 2) x (n - 3) ... 3 x 2 x 1

If n = 0, then n! = 1, by convention.

Example: 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720

Shortcut to find trailing zeros in a factorial

Trailing zeros are a sequence of zeros in the decimal representation of a number, after which no other digits follow. This video shows how to find the trailing zeros of a factorial easily.

Table of factorials until 30

n	n!
1!	1	#
2!	2	#
3!	6	#
4!	24	#
5!	120	#
6!	720	#
7!	5040	#
8!	40320	#
9!	362880	#
10!	3628800	#
11!	39916800	#
12!	479001600	#
13!	6227020800	#
14!	87178291200	#
15!	1307674368000	#
16!	20922789888000	#
17!	355687428096000	#
18!	6402373705728000	#
19!	121645100408832000	#
20!	2432902008176640000	#
21!	51090942171709440000	#
22!	1124000727777607680000	#
23!	25852016738884976640000	#
24!	620448401733239439360000	#
25!	15511210043330985984000000	#
26!	403291461126605635584000000	#
27!	10888869450418352160768000000	#
28!	304888344611713860501504000000	#
29!	8841761993739701954543616000000	#
30!	265252859812191058636308480000000	#

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