56656505568 has 48 divisors (see below), whose sum is σ = 160163586576. Its totient is φ = 17432770560.

The previous prime is 56656505539. The next prime is 56656505627. The reversal of 56656505568 is 86550565665.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22697673 + ... + 22700168.

It is an arithmetic number, because the mean of its divisors is an integer number (3336741387).

Almost surely, 2^56656505568 is an apocalyptic number.

It is an amenable number.

56656505568 is an abundant number, since it is smaller than the sum of its proper divisors (103507081008).

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

56656505568 is a wasteful number, since it uses less digits than its factorization.

56656505568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45397867 (or 45397859 counting only the distinct ones).

The product of its (nonzero) digits is 32400000, while the sum is 57.

The spelling of 56656505568 in words is "fifty-six billion, six hundred fifty-six million, five hundred five thousand, five hundred sixty-eight".