57256320915 has 12 divisors (see below), whose sum is σ = 99244289664. Its totient is φ = 30536704464.

The previous prime is 57256320889. The next prime is 57256320917. The reversal of 57256320915 is 51902365275.

57256320915 is a `hidden beast` number, since 5 + 7 + 2 + 5 + 632 + 0 + 9 + 1 + 5 = 666.

It is not a de Polignac number, because 57256320915 - 2¹⁶ = 57256255379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1272362687 = 57256320915 / (5 + 7 + 2 + 5 + 6 + 3 + 2 + 0 + 9 + 1 + 5).

It is not an unprimeable number, because it can be changed into a prime (57256320917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 636181299 + ... + 636181388.

It is an arithmetic number, because the mean of its divisors is an integer number (8270357472).

Almost surely, 2^57256320915 is an apocalyptic number.

57256320915 is a deficient number, since it is larger than the sum of its proper divisors (41987968749).

57256320915 is a wasteful number, since it uses less digits than its factorization.

57256320915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272362698 (or 1272362695 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 57256320915 in words is "fifty-seven billion, two hundred fifty-six million, three hundred twenty thousand, nine hundred fifteen".