What is the Factorial of Hundred (100)?

The factorial of 100, written as 100!, is the product of all positive integers from 1 to 100. In mathematical terms: 100!=100×99×98×…×2×1
100! = 100 \times 99 \times 98 \times \….. \times 2 \times 1
100!=100×99×98×…×2×1

This number is extremely large and cannot be written out in full easily due to its length. In fact:

100! = 9.332621544394415268169923885626670049071596826438162146859296389… × 10¹⁵⁷

(That’s over 157 digits long!)

Why is Factorial Important?

Factorials are widely used in:

Combinatorics (e.g., permutations and combinations)

Probability and statistics

Mathematical analysis

Computer science algorithms

Table of Factorials (1! to 20!)

To better understand how factorials grow, here’s a table from 1! to 20!:

n	n! (Factorial)
1	1
2	2
3	6
4	24
5	120
6	720
7	5,040
8	40,320
9	362,880
10	3,628,800
11	39,916,800
12	479,001,600
13	6,227,020,800
14	87,178,291,200
15	1,307,674,368,000
16	20,922,789,888,000
17	355,687,428,096,000
18	6,402,373,705,728,000
19	121,645,100,408,832,000
20	2,432,902,008,176,640,000

Also Read:
How Do I Convert 1 Cent to Square Feet?
How to write Roman numbers 1 to 100?
75 degrees fahrenheit to celsius