15997328788 has 24 divisors (see below), whose sum is σ = 32074467264. Its totient is φ = 6838896000.

The previous prime is 15997328773. The next prime is 15997328801. The reversal of 15997328788 is 88782379951.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701158 + ... + 723613.

It is an arithmetic number, because the mean of its divisors is an integer number (1336436136).

Almost surely, 2^15997328788 is an apocalyptic number.

It is an amenable number.

15997328788 is an abundant number, since it is smaller than the sum of its proper divisors (16077138476).

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

15997328788 is a wasteful number, since it uses less digits than its factorization.

15997328788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425183 (or 1425181 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 67.

The spelling of 15997328788 in words is "fifteen billion, nine hundred ninety-seven million, three hundred twenty-eight thousand, seven hundred eighty-eight".