685379467656 has 128 divisors (see below), whose sum is σ = 2076234048000. Its totient is φ = 208216479744.

The previous prime is 685379467649. The next prime is 685379467679. The reversal of 685379467656 is 656764973586.

685379467656 is a `hidden beast` number, since 6 + 85 + 37 + 9 + 467 + 6 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1322985 + ... + 1766648.

It is an arithmetic number, because the mean of its divisors is an integer number (16220578500).

Almost surely, 2^685379467656 is an apocalyptic number.

It is an amenable number.

685379467656 is an abundant number, since it is smaller than the sum of its proper divisors (1390854580344).

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

685379467656 is a wasteful number, since it uses less digits than its factorization.

685379467656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089740 (or 3089730 counting only the distinct ones).

The product of its digits is 1371686400, while the sum is 72.

The spelling of 685379467656 in words is "six hundred eighty-five billion, three hundred seventy-nine million, four hundred sixty-seven thousand, six hundred fifty-six".