56390534538 has 48 divisors (see below), whose sum is σ = 122290760160. Its totient is φ = 17327224512.

The previous prime is 56390534521. The next prime is 56390534567. The reversal of 56390534538 is 83543509365.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 711720 + ... + 786972.

It is an arithmetic number, because the mean of its divisors is an integer number (2547724170).

Almost surely, 2^56390534538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56390534538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61145380080).

56390534538 is an abundant number, since it is smaller than the sum of its proper divisors (65900225622).

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

56390534538 is a wasteful number, since it uses less digits than its factorization.

56390534538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76023 (or 76010 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 56390534538 in words is "fifty-six billion, three hundred ninety million, five hundred thirty-four thousand, five hundred thirty-eight".