56515012775 has 12 divisors (see below), whose sum is σ = 75469279032. Its totient is φ = 41734163040.

The previous prime is 56515012733. The next prime is 56515012781. The reversal of 56515012775 is 57721051565.

It is not a de Polignac number, because 56515012775 - 2¹⁸ = 56514750631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86945849 + ... + 86946498.

It is an arithmetic number, because the mean of its divisors is an integer number (6289106586).

Almost surely, 2^56515012775 is an apocalyptic number.

56515012775 is a deficient number, since it is larger than the sum of its proper divisors (18954266257).

56515012775 is a wasteful number, since it uses less digits than its factorization.

56515012775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173892370 (or 173892365 counting only the distinct ones).

The product of its (nonzero) digits is 367500, while the sum is 44.

The spelling of 56515012775 in words is "fifty-six billion, five hundred fifteen million, twelve thousand, seven hundred seventy-five".