15905996804 has 24 divisors (see below), whose sum is σ = 28253691648. Its totient is φ = 7833721280.

The previous prime is 15905996803. The next prime is 15905996837. The reversal of 15905996804 is 40869950951.

It is a self number, because there is not a number n which added to its sum of digits gives 15905996804.

It is not an unprimeable number, because it can be changed into a prime (15905996803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287864 + ... + 338640.

It is an arithmetic number, because the mean of its divisors is an integer number (1177237152).

Almost surely, 2^15905996804 is an apocalyptic number.

It is an amenable number.

15905996804 is a deficient number, since it is larger than the sum of its proper divisors (12347694844).

15905996804 is a wasteful number, since it uses less digits than its factorization.

15905996804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51955 (or 51953 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 15905996804 in words is "fifteen billion, nine hundred five million, nine hundred ninety-six thousand, eight hundred four".