56654564880 has 80 divisors (see below), whose sum is σ = 175806051264. Its totient is φ = 15092666880.

The previous prime is 56654564867. The next prime is 56654564881. The reversal of 56654564880 is 8846545665.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 56654564880.

It is not an unprimeable number, because it can be changed into a prime (56654564881) 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, 120895 + ... + 357665.

Almost surely, 2^56654564880 is an apocalyptic number.

It is an amenable number.

56654564880 is an abundant number, since it is smaller than the sum of its proper divisors (119151486384).

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

56654564880 is a wasteful number, since it uses less digits than its factorization.

56654564880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237784 (or 237778 counting only the distinct ones).

The product of its (nonzero) digits is 27648000, while the sum is 57.

The spelling of 56654564880 in words is "fifty-six billion, six hundred fifty-four million, five hundred sixty-four thousand, eight hundred eighty".