685631997846 has 20 divisors (see below), whose sum is σ = 1536323551092. Its totient is φ = 228543999228.

The previous prime is 685631997769. The next prime is 685631997887. The reversal of 685631997846 is 648799136586.

685631997846 is a `hidden beast` number, since 6 + 8 + 563 + 19 + 9 + 7 + 8 + 46 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2116147980 + ... + 2116148303.

Almost surely, 2^685631997846 is an apocalyptic number.

685631997846 is an abundant number, since it is smaller than the sum of its proper divisors (850691553246).

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

685631997846 is a wasteful number, since it uses less digits than its factorization.

685631997846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232296297 (or 4232296288 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 72.

The spelling of 685631997846 in words is "six hundred eighty-five billion, six hundred thirty-one million, nine hundred ninety-seven thousand, eight hundred forty-six".