56871788717865 has 128 divisors (see below), whose sum is σ = 108981899712000. Its totient is φ = 24999401226240.

The previous prime is 56871788717851. The next prime is 56871788717893.

56871788717865 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56871788717865 - 2²⁷ = 56871654500137 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 34415061 + ... + 36029709.

It is an arithmetic number, because the mean of its divisors is an integer number (851421091500).

Almost surely, 2^{56871788717865} is an apocalyptic number.

56871788717865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56871788717865 is a deficient number, since it is larger than the sum of its proper divisors (52110110994135).

56871788717865 is a wasteful number, since it uses less digits than its factorization.

56871788717865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615147.

The product of its digits is 8851046400, while the sum is 84.

The spelling of 56871788717865 in words is "fifty-six trillion, eight hundred seventy-one billion, seven hundred eighty-eight million, seven hundred seventeen thousand, eight hundred sixty-five".