85686643164 has 24 divisors (see below), whose sum is σ = 199940419728. Its totient is φ = 28561511680.

The previous prime is 85686643139. The next prime is 85686643247. The reversal of 85686643164 is 46134668658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710374 + ... + 822194.

It is an arithmetic number, because the mean of its divisors is an integer number (8330850822).

Almost surely, 2^85686643164 is an apocalyptic number.

It is an amenable number.

85686643164 is an abundant number, since it is smaller than the sum of its proper divisors (114253776564).

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

85686643164 is a wasteful number, since it uses less digits than its factorization.

85686643164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175685 (or 175683 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 57.

The spelling of 85686643164 in words is "eighty-five billion, six hundred eighty-six million, six hundred forty-three thousand, one hundred sixty-four".