56816687136 has 48 divisors (see below), whose sum is σ = 162702334368. Its totient is φ = 17217177600.

The previous prime is 56816687113. The next prime is 56816687141. The reversal of 56816687136 is 63178661865.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×56816687136² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26900785 + ... + 26902896.

It is an arithmetic number, because the mean of its divisors is an integer number (3389631966).

Almost surely, 2^56816687136 is an apocalyptic number.

It is an amenable number.

56816687136 is an abundant number, since it is smaller than the sum of its proper divisors (105885647232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56816687136 is a wasteful number, since it uses less digits than its factorization.

56816687136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53803705 (or 53803697 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The spelling of 56816687136 in words is "fifty-six billion, eight hundred sixteen million, six hundred eighty-seven thousand, one hundred thirty-six".