865956464655 has 32 divisors (see below), whose sum is σ = 1432337983488. Its totient is φ = 446284924800.

The previous prime is 865956464647. The next prime is 865956464677. The reversal of 865956464655 is 556464659568.

It is not a de Polignac number, because 865956464655 - 2³ = 865956464647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 865956464655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1060581 + ... + 1690190.

It is an arithmetic number, because the mean of its divisors is an integer number (44760561984).

Almost surely, 2^865956464655 is an apocalyptic number.

865956464655 is a deficient number, since it is larger than the sum of its proper divisors (566381518833).

865956464655 is a wasteful number, since it uses less digits than its factorization.

865956464655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751487.

The product of its digits is 933120000, while the sum is 69.

The spelling of 865956464655 in words is "eight hundred sixty-five billion, nine hundred fifty-six million, four hundred sixty-four thousand, six hundred fifty-five".