685835880752 has 40 divisors (see below), whose sum is σ = 1463681556480. Its totient is φ = 308716937280.

The previous prime is 685835880749. The next prime is 685835880781. The reversal of 685835880752 is 257088538586.

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 7 ways as a sum of consecutive naturals, for example, 18898352 + ... + 18934607.

It is an arithmetic number, because the mean of its divisors is an integer number (36592038912).

Almost surely, 2^685835880752 is an apocalyptic number.

It is an amenable number.

685835880752 is an abundant number, since it is smaller than the sum of its proper divisors (777845675728).

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

685835880752 is a wasteful number, since it uses less digits than its factorization.

685835880752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37833081 (or 37833075 counting only the distinct ones).

The product of its (nonzero) digits is 129024000, while the sum is 65.

The spelling of 685835880752 in words is "six hundred eighty-five billion, eight hundred thirty-five million, eight hundred eighty thousand, seven hundred fifty-two".