685736020608 has 64 divisors (see below), whose sum is σ = 1821586151520. Its totient is φ = 228566144000.

The previous prime is 685736020601. The next prime is 685736020621. The reversal of 685736020608 is 806020637586.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (685736020601) by changing a digit.

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, 9275566 + ... + 9349202.

Almost surely, 2^685736020608 is an apocalyptic number.

It is an amenable number.

685736020608 is an abundant number, since it is smaller than the sum of its proper divisors (1135850130912).

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

685736020608 is a wasteful number, since it uses less digits than its factorization.

685736020608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97905 (or 97893 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 685736020608 in words is "six hundred eighty-five billion, seven hundred thirty-six million, twenty thousand, six hundred eight".