15917378924 has 12 divisors (see below), whose sum is σ = 27978125784. Its totient is φ = 7923628704.

The previous prime is 15917378881. The next prime is 15917378933. The reversal of 15917378924 is 42987371951.

It is a self number, because there is not a number n which added to its sum of digits gives 15917378924.

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 3 ways as a sum of consecutive naturals, for example, 8764169 + ... + 8765984.

It is an arithmetic number, because the mean of its divisors is an integer number (2331510482).

Almost surely, 2^15917378924 is an apocalyptic number.

It is an amenable number.

15917378924 is a deficient number, since it is larger than the sum of its proper divisors (12060746860).

15917378924 is a wasteful number, since it uses less digits than its factorization.

15917378924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17530384 (or 17530382 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 56.

The spelling of 15917378924 in words is "fifteen billion, nine hundred seventeen million, three hundred seventy-eight thousand, nine hundred twenty-four".