864656900871 has 32 divisors (see below), whose sum is σ = 1162936147968. Its totient is φ = 571432642560.

The previous prime is 864656900869. The next prime is 864656900929. The reversal of 864656900871 is 178009656468.

It is not a de Polignac number, because 864656900871 - 2¹ = 864656900869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864656900801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223828486 + ... + 223832348.

It is an arithmetic number, because the mean of its divisors is an integer number (36341754624).

Almost surely, 2^864656900871 is an apocalyptic number.

864656900871 is a deficient number, since it is larger than the sum of its proper divisors (298279247097).

864656900871 is a wasteful number, since it uses less digits than its factorization.

864656900871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 864656900871 in words is "eight hundred sixty-four billion, six hundred fifty-six million, nine hundred thousand, eight hundred seventy-one".