57656221272 has 96 divisors (see below), whose sum is σ = 170674074480. Its totient is φ = 17475575040.

The previous prime is 57656221261. The next prime is 57656221277. The reversal of 57656221272 is 27212265675.

57656221272 is a `hidden beast` number, since 5 + 7 + 6 + 5 + 622 + 12 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57656221277) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 396979 + ... + 522402.

Almost surely, 2^57656221272 is an apocalyptic number.

57656221272 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

57656221272 is an abundant number, since it is smaller than the sum of its proper divisors (113017853208).

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

57656221272 is a wasteful number, since it uses less digits than its factorization.

57656221272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919473 (or 919466 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 57656221272 in words is "fifty-seven billion, six hundred fifty-six million, two hundred twenty-one thousand, two hundred seventy-two".