# What is 75 factorial ?

Steps to calculate factorial of 75

## How to calculate the factorial of 75

To find 75 factorial, or 75!, simply use the formula that multiplies the number 75 by all positive whole numbers less than it.

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

75! is exactly : 24809140811395398091946477116594033660926243886570122837795894512655842677572867409443815424000000000000000000

Factorial of 75 can be calculated as:
75! = 75 x 74 x 73 x 72 x ... x 3 x 2 x 1

The number of trailing zeros in 75! is 18

The number of digits in 75 factorial is 110.

## What Is Factorial?

A factorial is showed by an integer and an exclamation tag. In Mathematics, factorial is a multiplication treatment of natural numbers .

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

Symbolically, it is symbolized as "!".

The function is used, among other things, to find the "n" way elements can be established .

## Factorial Formula

To find the factorial of any given number, alternate the value for n in the given rule :

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

The expansion of the formula provides the numbers to be replicated at the same time to obtain the factorial of the number.

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

So the rule is : n! = n × (n−1)!

Example :
75! Factorial = 75 x 74 x 73 x 72 x ... x 3 x 2 x 1 = 75 × 74! = 24809140811395398091946477116594033660926243886570122837795894512655842677572867409443815424000000000000000000

## 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 value is corresponding to 1. So, 0! = 1.