15978115113 has 48 divisors (see below), whose sum is σ = 23335038720. Its totient is φ = 9696469824.

The previous prime is 15978115067. The next prime is 15978115133. The reversal of 15978115113 is 31151187951.

15978115113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15978115113 - 2²⁶ = 15911006249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15978115133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6475506 + ... + 6477972.

It is an arithmetic number, because the mean of its divisors is an integer number (486146640).

Almost surely, 2^15978115113 is an apocalyptic number.

It is an amenable number.

15978115113 is a deficient number, since it is larger than the sum of its proper divisors (7356923607).

15978115113 is a wasteful number, since it uses less digits than its factorization.

15978115113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646 (or 2609 counting only the distinct ones).

The product of its digits is 37800, while the sum is 42.

The spelling of 15978115113 in words is "fifteen billion, nine hundred seventy-eight million, one hundred fifteen thousand, one hundred thirteen".