685938889636 has 96 divisors (see below), whose sum is σ = 1663707709440. Its totient is φ = 238733481600.

The previous prime is 685938889631. The next prime is 685938889663. The reversal of 685938889636 is 636988839586.

It is not an unprimeable number, because it can be changed into a prime (685938889631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2638996 + ... + 2887243.

It is an arithmetic number, because the mean of its divisors is an integer number (17330288640).

Almost surely, 2^685938889636 is an apocalyptic number.

It is an amenable number.

685938889636 is an abundant number, since it is smaller than the sum of its proper divisors (977768819804).

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

685938889636 is a wasteful number, since it uses less digits than its factorization.

685938889636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5526305 (or 5526303 counting only the distinct ones).

The product of its digits is 3224862720, while the sum is 79.

The spelling of 685938889636 in words is "six hundred eighty-five billion, nine hundred thirty-eight million, eight hundred eighty-nine thousand, six hundred thirty-six".