56881688618865 has 64 divisors (see below), whose sum is σ = 101970051628032. Its totient is φ = 26833020192000.

The previous prime is 56881688618749. The next prime is 56881688618873.

56881688618865 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56881688618865 - 2⁸ = 56881688618609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 393401074 + ... + 393545636.

It is an arithmetic number, because the mean of its divisors is an integer number (1593282056688).

Almost surely, 2^{56881688618865} is an apocalyptic number.

56881688618865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56881688618865 is a deficient number, since it is larger than the sum of its proper divisors (45088363009167).

56881688618865 is a wasteful number, since it uses less digits than its factorization.

56881688618865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209070.

The product of its digits is 8493465600, while the sum is 84.

The spelling of 56881688618865 in words is "fifty-six trillion, eight hundred eighty-one billion, six hundred eighty-eight million, six hundred eighteen thousand, eight hundred sixty-five".