685354318824 has 32 divisors (see below), whose sum is σ = 1958155197120. Its totient is φ = 195815519616.

The previous prime is 685354318813. The next prime is 685354318843. The reversal of 685354318824 is 428813453586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039744829 + ... + 2039745164.

It is an arithmetic number, because the mean of its divisors is an integer number (61192349910).

Almost surely, 2^685354318824 is an apocalyptic number.

It is an amenable number.

685354318824 is an abundant number, since it is smaller than the sum of its proper divisors (1272800878296).

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

685354318824 is a wasteful number, since it uses less digits than its factorization.

685354318824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079490009 (or 4079490005 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 57.

The spelling of 685354318824 in words is "six hundred eighty-five billion, three hundred fifty-four million, three hundred eighteen thousand, eight hundred twenty-four".