85687387864 has 32 divisors (see below), whose sum is σ = 176703952320. Its totient is φ = 38706575616.

The previous prime is 85687387847. The next prime is 85687387873. The reversal of 85687387864 is 46878378658.

It is a junction number, because it is equal to n+sod(n) for n = 85687387793 and 85687387802.

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, 8760189 + ... + 8769964.

It is an arithmetic number, because the mean of its divisors is an integer number (5521998510).

Almost surely, 2^85687387864 is an apocalyptic number.

It is an amenable number.

85687387864 is an abundant number, since it is smaller than the sum of its proper divisors (91016564456).

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

85687387864 is a wasteful number, since it uses less digits than its factorization.

85687387864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530219 (or 17530215 counting only the distinct ones).

The product of its digits is 433520640, while the sum is 70.

The spelling of 85687387864 in words is "eighty-five billion, six hundred eighty-seven million, three hundred eighty-seven thousand, eight hundred sixty-four".