15975798816 has 24 divisors (see below), whose sum is σ = 41936472144. Its totient is φ = 5325266240.

The previous prime is 15975798791. The next prime is 15975798847. The reversal of 15975798816 is 61889757951.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×15975798816² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83207190 + ... + 83207381.

It is an arithmetic number, because the mean of its divisors is an integer number (1747353006).

Almost surely, 2^15975798816 is an apocalyptic number.

15975798816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15975798816 is an abundant number, since it is smaller than the sum of its proper divisors (25960673328).

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

15975798816 is a wasteful number, since it uses less digits than its factorization.

15975798816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166414584 (or 166414576 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 66.

The spelling of 15975798816 in words is "fifteen billion, nine hundred seventy-five million, seven hundred ninety-eight thousand, eight hundred sixteen".