56616621572 has 48 divisors (see below), whose sum is σ = 119227745280. Its totient is φ = 22980477600.

The previous prime is 56616621571. The next prime is 56616621577. The reversal of 56616621572 is 27512661665.

It is not an unprimeable number, because it can be changed into a prime (56616621571) 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, 2067047 + ... + 2094257.

It is an arithmetic number, because the mean of its divisors is an integer number (2483911360).

Almost surely, 2^56616621572 is an apocalyptic number.

It is an amenable number.

56616621572 is an abundant number, since it is smaller than the sum of its proper divisors (62611123708).

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

56616621572 is a wasteful number, since it uses less digits than its factorization.

56616621572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31152 (or 31150 counting only the distinct ones).

The product of its digits is 907200, while the sum is 47.

The spelling of 56616621572 in words is "fifty-six billion, six hundred sixteen million, six hundred twenty-one thousand, five hundred seventy-two".