27556056864 has 72 divisors (see below), whose sum is σ = 89557191360. Its totient is φ = 7873158528.

The previous prime is 27556056811. The next prime is 27556056937. The reversal of 27556056864 is 46865065572.

27556056864 is a `hidden beast` number, since 2 + 7 + 556 + 0 + 5 + 6 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 27556056864.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6832324 + ... + 6836355.

It is an arithmetic number, because the mean of its divisors is an integer number (1243849880).

Almost surely, 2^27556056864 is an apocalyptic number.

27556056864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27556056864 is an abundant number, since it is smaller than the sum of its proper divisors (62001134496).

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

27556056864 is a wasteful number, since it uses less digits than its factorization.

27556056864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13668702 (or 13668691 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 27556056864 in words is "twenty-seven billion, five hundred fifty-six million, fifty-six thousand, eight hundred sixty-four".