# What is 27 factorial ?

Steps to calculate factorial of 27

## How to calculate the factorial of 27

To find 27 factorial, or 27!, simply use the formula that multiplies the number 27 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of Twenty-seven :

27! is exactly : 10888869450418352160768000000

Factorial of 27 can be calculated as:
27! = 27 x 26 x 25 x 24 x ... x 3 x 2 x 1

The number of trailing zeros in 27! is 6

The number of digits in 27 factorial is 29.

## What Is Factorial?

A factorial is represented by an integer and an exclamation symbol. In Mathematics, factorial is a multiplication process of natural numbers .

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

Symbolically, it is represented as "!".

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

## Factorial Formula

To find the factorial of any given number, replace the exact value for n in the given formula :

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

The expansion of the formula provides the numbers to be replicated together with each other to get the factorial of the number.

We can also calculate a factorial from the prior 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 :
27! Factorial = 27 x 26 x 25 x 24 x ... x 3 x 2 x 1 = 27 × 26! = 10888869450418352160768000000

## 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

1) Can we have factorials for negative numbers ?
Negative integer factorials are undefined

2) What Is 0!
Zero factorial or Factorial of 0 is simple, and its own value is corresponding to 1. So, 0! = 1.