# What is 72 factorial ?

Steps to calculate factorial of 72

## How to calculate the factorial of 72

To find 72 factorial, or 72!, simply use the formula that multiplies the number 72 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of Seventy-two :

72! is exactly : 61234458376886086861524070385274672740778091784697328983823014963978384987221689274204160000000000000000

Factorial of 72 can be calculated as:
72! = 72 x 71 x 70 x 69 x ... x 3 x 2 x 1

The number of trailing zeros in 72! is 17

The number of digits in 72 factorial is 104.

## What Is Factorial?

A factorial is displayed by an integer and an exclamation symbol. In math concepts, factorial is a multiplication process of natural numbers .

It multiplies the number by every noreal number that is less than it .

Symbolically, it is listed as "!".

The function is used, among other things, to get the "n" way things can be arranged .

## Factorial Formula

To find the factorial of any given number, exchange the exact value for n in the given formulation :

n! = n × (n-1) × (n-2) × (n-3) × ….× 3 × 2 × 1

The expansion of the formula provides numbers to be multiplied with each other to have the factorial of the number.

We can also work out a factorial from the previous one. The factorial of any number is that number replicated the factorial of (that number minus 1).

So the rule is : n! = n × (n−1)!

Example :
72! Factorial = 72 x 71 x 70 x 69 x ... x 3 x 2 x 1 = 72 × 71! = 61234458376886086861524070385274672740778091784697328983823014963978384987221689274204160000000000000000

## What are Factorials Used For?

The best use of factorial is in Combinations and Permutations.

Example : Determine how to arrange letters without repeating?

There one way for 1 letter "a":
2 ways for two letters "ab": ab, ba.
There are 6 ways for 3 letters "abc": abc acb cab bac bca.
There are 24 ways for 1234 of the letters "abcd"

## Frequently Asked Questions on Factorial

### Can we have factorials for negative numbers ?

Negative number factorials are undefined

### What Is 0!

Zero factorial or Factorial of 0 is simple, and its own value is equal to 1. So, 0! = 1.