56821314517 has 16 divisors (see below), whose sum is σ = 65615647680. Its totient is φ = 48714624000.

The previous prime is 56821314509. The next prime is 56821314569. The reversal of 56821314517 is 71541312865.

It is a cyclic number.

It is not a de Polignac number, because 56821314517 - 2³ = 56821314509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821314587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2057484 + ... + 2084917.

It is an arithmetic number, because the mean of its divisors is an integer number (4100977980).

Almost surely, 2^56821314517 is an apocalyptic number.

It is an amenable number.

56821314517 is a deficient number, since it is larger than the sum of its proper divisors (8794333163).

56821314517 is a wasteful number, since it uses less digits than its factorization.

56821314517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142484.

The product of its digits is 201600, while the sum is 43.

The spelling of 56821314517 in words is "fifty-six billion, eight hundred twenty-one million, three hundred fourteen thousand, five hundred seventeen".