685885899216 has 80 divisors (see below), whose sum is σ = 2094823958400. Its totient is φ = 189209900544.

The previous prime is 685885899163. The next prime is 685885899227. The reversal of 685885899216 is 612998588586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35185551 + ... + 35205038.

It is an arithmetic number, because the mean of its divisors is an integer number (26185299480).

Almost surely, 2^685885899216 is an apocalyptic number.

It is an amenable number.

685885899216 is an abundant number, since it is smaller than the sum of its proper divisors (1408938059184).

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

685885899216 is a wasteful number, since it uses less digits than its factorization.

685885899216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70390636 (or 70390630 counting only the distinct ones).

The product of its digits is 597196800, while the sum is 75.

The spelling of 685885899216 in words is "six hundred eighty-five billion, eight hundred eighty-five million, eight hundred ninety-nine thousand, two hundred sixteen".