85687790944 has 48 divisors (see below), whose sum is σ = 201180043008. Its totient is φ = 35126669952.

The previous prime is 85687790939. The next prime is 85687790957. The reversal of 85687790944 is 44909778658.

It is a super-2 number, since 2×85687790944² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85687790944.

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, 8310822 + ... + 8321125.

It is an arithmetic number, because the mean of its divisors is an integer number (4191250896).

Almost surely, 2^85687790944 is an apocalyptic number.

It is an amenable number.

85687790944 is an abundant number, since it is smaller than the sum of its proper divisors (115492252064).

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

85687790944 is a wasteful number, since it uses less digits than its factorization.

85687790944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16631987 (or 16631979 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 67.

The spelling of 85687790944 in words is "eighty-five billion, six hundred eighty-seven million, seven hundred ninety thousand, nine hundred forty-four".