685885610 has 16 divisors (see below), whose sum is σ = 1235229696. Its totient is φ = 274213008.

The previous prime is 685885601. The next prime is 685885649. The reversal of 685885610 is 16588586.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4007 + ... + 37253.

It is an arithmetic number, because the mean of its divisors is an integer number (77201856).

Almost surely, 2^685885610 is an apocalyptic number.

685885610 is a deficient number, since it is larger than the sum of its proper divisors (549344086).

685885610 is a wasteful number, since it uses less digits than its factorization.

685885610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35317.

The product of its (nonzero) digits is 460800, while the sum is 47.

The square root of 685885610 is about 26189.4179011295. The cubic root of 685885610 is about 881.8957109875.

The spelling of 685885610 in words is "six hundred eighty-five million, eight hundred eighty-five thousand, six hundred ten".