685624877864 has 32 divisors (see below), whose sum is σ = 1331545098240. Its totient is φ = 330621672000.

The previous prime is 685624877863. The next prime is 685624877867. The reversal of 685624877864 is 468778426586.

685624877864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (685624877863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4645112 + ... + 4790439.

It is an arithmetic number, because the mean of its divisors is an integer number (41610784320).

Almost surely, 2^685624877864 is an apocalyptic number.

It is an amenable number.

685624877864 is a deficient number, since it is larger than the sum of its proper divisors (645920220376).

685624877864 is a wasteful number, since it uses less digits than its factorization.

685624877864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9435881 (or 9435877 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 71.

The spelling of 685624877864 in words is "six hundred eighty-five billion, six hundred twenty-four million, eight hundred seventy-seven thousand, eight hundred sixty-four".