15685985842992 has 30 divisors (see below), whose sum is σ = 43898974269332. Its totient is φ = 5228661947616.

The previous prime is 15685985842987. The next prime is 15685985843051. The reversal of 15685985842992 is 29924858958651.

15685985842992 is a `hidden beast` number, since 1 + 5 + 6 + 8 + 5 + 9 + 8 + 584 + 29 + 9 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54465228478 + ... + 54465228765.

Almost surely, 2^{15685985842992} is an apocalyptic number.

15685985842992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15685985842992 is an abundant number, since it is smaller than the sum of its proper divisors (28212988426340).

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

15685985842992 is a wasteful number, since it uses less digits than its factorization.

15685985842992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108930457257 (or 108930457248 counting only the distinct ones).

The product of its digits is 4478976000, while the sum is 81.

The spelling of 15685985842992 in words is "fifteen trillion, six hundred eighty-five billion, nine hundred eighty-five million, eight hundred forty-two thousand, nine hundred ninety-two".