685839164 has 48 divisors (see below), whose sum is σ = 1274972160. Its totient is φ = 322297920.

The previous prime is 685839163. The next prime is 685839169. The reversal of 685839164 is 461938586.

Its product of digits (1244160) is a multiple of the sum of its prime factors (810).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685839163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562057 + ... + 1562495.

It is an arithmetic number, because the mean of its divisors is an integer number (26561920).

Almost surely, 2^685839164 is an apocalyptic number.

It is an amenable number.

685839164 is a deficient number, since it is larger than the sum of its proper divisors (589132996).

685839164 is a wasteful number, since it uses less digits than its factorization.

685839164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 808 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 685839164 is about 26188.5311539231. The cubic root of 685839164 is about 881.8758041438.

The spelling of 685839164 in words is "six hundred eighty-five million, eight hundred thirty-nine thousand, one hundred sixty-four".