15981658848 has 36 divisors (see below), whose sum is σ = 45447843168. Its totient is φ = 5327219520.

The previous prime is 15981658801. The next prime is 15981658853. The reversal of 15981658848 is 84885618951.

15981658848 is a `hidden beast` number, since 1 + 5 + 9 + 8 + 1 + 6 + 588 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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, 27745648 + ... + 27746223.

It is an arithmetic number, because the mean of its divisors is an integer number (1262440088).

Almost surely, 2^15981658848 is an apocalyptic number.

15981658848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15981658848 is an abundant number, since it is smaller than the sum of its proper divisors (29466184320).

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

15981658848 is a wasteful number, since it uses less digits than its factorization.

15981658848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55491887 (or 55491876 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 63.

The spelling of 15981658848 in words is "fifteen billion, nine hundred eighty-one million, six hundred fifty-eight thousand, eight hundred forty-eight".