What is 87 factorial ?

Steps to calculate factorial of 87

How to calculate the factorial of 87

To find 87 factorial, or 87!, simply use the formula that multiplies the number 87 by all positive whole numbers less than it.

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

  87! is exactly : 2107757298379527717213600518699389595229783738061356212322972511214654115727593174080683423236414793504734471782400000000000000000000

  Factorial of 87 can be calculated as:
87! = 87 x 86 x 85 x 84 x ... x 3 x 2 x 1

  The number of trailing zeros in 87! is 20

  The number of digits in 87 factorial is 133.

What Is Factorial?

A factorial is showed by an integer and an exclamation tag. In math concepts, factorial is a multiplication procedure of natural numbers .

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

Symbolically, it is represented as "!".

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

Factorial Formula

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

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

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

We can also calculate 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 :
87! Factorial = 87 x 86 x 85 x 84 x ... x 3 x 2 x 1 = 87 × 86! = 2107757298379527717213600518699389595229783738061356212322972511214654115727593174080683423236414793504734471782400000000000000000000

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 integer factorials are undefined

What Is 0!

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

Other conversions of the number 87