This online Factorial Calculator finds the factorial (n!) of an integer non-negative number n using arbitrary-precision decimal arithmetic. The result is presented both in scientific notation and in the form of a long integer number.
Calculate factorial
Factorial of a non-negative integer n is the product of all positive integers less than or equal to n:
Factorials play important role in mathematics. They are found in Taylor expansions, combinatorics and number theory. For example, factorial of n is the number of ways one can arrange n different objects.
Our Factorial Calculator uses arbitrary-precision decimal arithmetic, so that you can get the exact value of the factorial even for a sufficiently large value of n within a reasonable time span (depending on the computational power of you computer).
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Check out our other math calculators such as Factoring Calculator or Fibonacci Calculator.