685068528864 has 24 divisors (see below), whose sum is σ = 1798304888520. Its totient is φ = 228356176256.

The previous prime is 685068528857. The next prime is 685068528883. The reversal of 685068528864 is 468825860586.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×685068528864² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685068528795 and 685068528804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568065159 + ... + 3568065350.

It is an arithmetic number, because the mean of its divisors is an integer number (74929370355).

Almost surely, 2^685068528864 is an apocalyptic number.

It is an amenable number.

685068528864 is an abundant number, since it is smaller than the sum of its proper divisors (1113236359656).

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

685068528864 is a wasteful number, since it uses less digits than its factorization.

685068528864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136130522 (or 7136130514 counting only the distinct ones).

The product of its (nonzero) digits is 176947200, while the sum is 66.

The spelling of 685068528864 in words is "six hundred eighty-five billion, sixty-eight million, five hundred twenty-eight thousand, eight hundred sixty-four".