56521942128 has 80 divisors (see below), whose sum is σ = 162338300160. Its totient is φ = 18829105344.

The previous prime is 56521942097. The next prime is 56521942129. The reversal of 56521942128 is 82124912565.

56521942128 is a `hidden beast` number, since 5 + 6 + 5 + 219 + 421 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56521942129) 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, 680901 + ... + 759387.

It is an arithmetic number, because the mean of its divisors is an integer number (2029228752).

Almost surely, 2^56521942128 is an apocalyptic number.

It is an amenable number.

56521942128 is an abundant number, since it is smaller than the sum of its proper divisors (105816358032).

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

56521942128 is a wasteful number, since it uses less digits than its factorization.

56521942128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80171 (or 80159 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 56521942128 in words is "fifty-six billion, five hundred twenty-one million, nine hundred forty-two thousand, one hundred twenty-eight".