15969797872 has 30 divisors (see below), whose sum is σ = 35364656904. Its totient is φ = 6843625920.

The previous prime is 15969797867. The next prime is 15969797881. The reversal of 15969797872 is 27879796951.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1331422 + ... + 1343362.

Almost surely, 2^15969797872 is an apocalyptic number.

It is an amenable number.

15969797872 is an abundant number, since it is smaller than the sum of its proper divisors (19394859032).

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

15969797872 is an frugal number, since it uses more digits than its factorization.

15969797872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23897 (or 11950 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 70.

The spelling of 15969797872 in words is "fifteen billion, nine hundred sixty-nine million, seven hundred ninety-seven thousand, eight hundred seventy-two".