15878913791 has 16 divisors (see below), whose sum is σ = 17661744576. Its totient is φ = 14183859456.

The previous prime is 15878913773. The next prime is 15878913797. The reversal of 15878913791 is 19731987851.

It is not a de Polignac number, because 15878913791 - 2⁶ = 15878913727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15878913791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15878913797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107555 + ... + 208148.

It is an arithmetic number, because the mean of its divisors is an integer number (1103859036).

Almost surely, 2^15878913791 is an apocalyptic number.

15878913791 is a deficient number, since it is larger than the sum of its proper divisors (1782830785).

15878913791 is a wasteful number, since it uses less digits than its factorization.

15878913791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315842.

The product of its digits is 3810240, while the sum is 59.

The spelling of 15878913791 in words is "fifteen billion, eight hundred seventy-eight million, nine hundred thirteen thousand, seven hundred ninety-one".