56907917815 has 16 divisors (see below), whose sum is σ = 78054432768. Its totient is φ = 39017928096.

The previous prime is 56907917813. The next prime is 56907917819. The reversal of 56907917815 is 51871970965.

It is not a de Polignac number, because 56907917815 - 2¹ = 56907917813 is a prime.

It is a super-2 number, since 2×56907917815² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56907917815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56907917813) 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, 215754 + ... + 400456.

It is an arithmetic number, because the mean of its divisors is an integer number (4878402048).

Almost surely, 2^56907917815 is an apocalyptic number.

56907917815 is a deficient number, since it is larger than the sum of its proper divisors (21146514953).

56907917815 is a wasteful number, since it uses less digits than its factorization.

56907917815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193518.

The product of its (nonzero) digits is 4762800, while the sum is 58.

The spelling of 56907917815 in words is "fifty-six billion, nine hundred seven million, nine hundred seventeen thousand, eight hundred fifteen".