56690655528 has 128 divisors (see below), whose sum is σ = 160964697600. Its totient is φ = 16494057216.

The previous prime is 56690655503. The next prime is 56690655533. The reversal of 56690655528 is 82555609665.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3233875 + ... + 3251357.

It is an arithmetic number, because the mean of its divisors is an integer number (1257536700).

Almost surely, 2^56690655528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56690655528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80482348800).

56690655528 is an abundant number, since it is smaller than the sum of its proper divisors (104274042072).

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

56690655528 is a wasteful number, since it uses less digits than its factorization.

56690655528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18071 (or 18067 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 57.

The spelling of 56690655528 in words is "fifty-six billion, six hundred ninety million, six hundred fifty-five thousand, five hundred twenty-eight".