56785871155 has 16 divisors (see below), whose sum is σ = 74058082560. Its totient is φ = 41549459328.

The previous prime is 56785871147. The next prime is 56785871227. The reversal of 56785871155 is 55117858765.

56785871155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56785871155 - 2³ = 56785871147 is a prime.

It is a super-2 number, since 2×56785871155² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56785871155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4000387 + ... + 4014556.

It is an arithmetic number, because the mean of its divisors is an integer number (4628630160).

Almost surely, 2^56785871155 is an apocalyptic number.

56785871155 is a deficient number, since it is larger than the sum of its proper divisors (17272211405).

56785871155 is a wasteful number, since it uses less digits than its factorization.

56785871155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015070.

The product of its digits is 11760000, while the sum is 58.

The spelling of 56785871155 in words is "fifty-six billion, seven hundred eighty-five million, eight hundred seventy-one thousand, one hundred fifty-five".