685169290864 has 40 divisors (see below), whose sum is σ = 1391798812032. Its totient is φ = 326136592320.

The previous prime is 685169290831. The next prime is 685169290903. The reversal of 685169290864 is 468092961586.

It is a junction number, because it is equal to n+sod(n) for n = 685169290796 and 685169290805.

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, 4334374 + ... + 4489669.

Almost surely, 2^685169290864 is an apocalyptic number.

It is an amenable number.

685169290864 is an abundant number, since it is smaller than the sum of its proper divisors (706629521168).

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

685169290864 is a wasteful number, since it uses less digits than its factorization.

685169290864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8824285 (or 8824279 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 685169290864 in words is "six hundred eighty-five billion, one hundred sixty-nine million, two hundred ninety thousand, eight hundred sixty-four".