15986797985886 has 64 divisors (see below), whose sum is σ = 39616226496000. Its totient is φ = 4188001044096.

The previous prime is 15986797985849. The next prime is 15986797985971. The reversal of 15986797985886 is 68858979768951.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15986797985793 and 15986797985802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98173176 + ... + 98335883.

It is an arithmetic number, because the mean of its divisors is an integer number (619003539000).

Almost surely, 2^{15986797985886} is an apocalyptic number.

15986797985886 is an abundant number, since it is smaller than the sum of its proper divisors (23629428510114).

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

15986797985886 is a wasteful number, since it uses less digits than its factorization.

15986797985886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196509233.

The product of its digits is 131681894400, while the sum is 96.

The spelling of 15986797985886 in words is "fifteen trillion, nine hundred eighty-six billion, seven hundred ninety-seven million, nine hundred eighty-five thousand, eight hundred eighty-six".