685747864 has 16 divisors (see below), whose sum is σ = 1286965800. Its totient is φ = 342556992.

The previous prime is 685747841. The next prime is 685747879. The reversal of 685747864 is 468747586.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30294 + ... + 47845.

Almost surely, 2^685747864 is an apocalyptic number.

It is an amenable number.

685747864 is a deficient number, since it is larger than the sum of its proper divisors (601217936).

685747864 is a wasteful number, since it uses less digits than its factorization.

685747864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79242 (or 79238 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 55.

The square root of 685747864 is about 26186.7879664536. The cubic root of 685747864 is about 881.8366701709.

The spelling of 685747864 in words is "six hundred eighty-five million, seven hundred forty-seven thousand, eight hundred sixty-four".