56571605655 has 32 divisors (see below), whose sum is σ = 95959676928. Its totient is φ = 28409097600.

The previous prime is 56571605639. The next prime is 56571605677. The reversal of 56571605655 is 55650617565.

It is not a de Polignac number, because 56571605655 - 2⁴ = 56571605639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56571605598 and 56571605607.

It is a congruent number.

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, 1626841 + ... + 1661250.

It is an arithmetic number, because the mean of its divisors is an integer number (2998739904).

Almost surely, 2^56571605655 is an apocalyptic number.

56571605655 is a deficient number, since it is larger than the sum of its proper divisors (39388071273).

56571605655 is a wasteful number, since it uses less digits than its factorization.

56571605655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288167.

The product of its (nonzero) digits is 4725000, while the sum is 51.

The spelling of 56571605655 in words is "fifty-six billion, five hundred seventy-one million, six hundred five thousand, six hundred fifty-five".