685808064 has 42 divisors (see below), whose sum is σ = 1965746640. Its totient is φ = 228602496.

The previous prime is 685808041. The next prime is 685808083. The reversal of 685808064 is 460808586.

685808064 is a `hidden beast` number, since 6 + 8 + 580 + 8 + 0 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 594744 + ... + 595895.

Almost surely, 2^685808064 is an apocalyptic number.

685808064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

685808064 is an abundant number, since it is smaller than the sum of its proper divisors (1279938576).

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

685808064 is a wasteful number, since it uses less digits than its factorization.

685808064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190657 (or 1190644 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 685808064 is about 26187.9373758225. The cubic root of 685808064 is about 881.8624741225.

The spelling of 685808064 in words is "six hundred eighty-five million, eight hundred eight thousand, sixty-four".