57215156656 has 40 divisors (see below), whose sum is σ = 127021584384. Its totient is φ = 24456740160.

The previous prime is 57215156623. The next prime is 57215156723. The reversal of 57215156656 is 65665151275.

It is a happy number.

It is a super-2 number, since 2×57215156656² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624010 + ... + 709801.

Almost surely, 2^57215156656 is an apocalyptic number.

57215156656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

57215156656 is an abundant number, since it is smaller than the sum of its proper divisors (69806427728).

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

57215156656 is a wasteful number, since it uses less digits than its factorization.

57215156656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334209 (or 1334203 counting only the distinct ones).

The product of its digits is 1890000, while the sum is 49.

The spelling of 57215156656 in words is "fifty-seven billion, two hundred fifteen million, one hundred fifty-six thousand, six hundred fifty-six".