685872972684 has 240 divisors, whose sum is σ = 1846860922368. Its totient is φ = 221851723392.

The previous prime is 685872972527. The next prime is 685872972703. The reversal of 685872972684 is 486279278586.

685872972684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1548245767 + ... + 1548246209.

Almost surely, 2^685872972684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685872972684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923430461184).

685872972684 is an abundant number, since it is smaller than the sum of its proper divisors (1160987949684).

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

685872972684 is a wasteful number, since it uses less digits than its factorization.

685872972684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1135 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 72.

The spelling of 685872972684 in words is "six hundred eighty-five billion, eight hundred seventy-two million, nine hundred seventy-two thousand, six hundred eighty-four".