15918919345 has 24 divisors (see below), whose sum is σ = 22437290304. Its totient is φ = 10809834336.

The previous prime is 15918919339. The next prime is 15918919349. The reversal of 15918919345 is 54391981951.

It is not a de Polignac number, because 15918919345 - 2⁷ = 15918919217 is a prime.

It is a super-2 number, since 2×15918919345² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15918919349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 290179 + ... + 340648.

It is an arithmetic number, because the mean of its divisors is an integer number (934887096).

Almost surely, 2^15918919345 is an apocalyptic number.

It is an amenable number.

15918919345 is a deficient number, since it is larger than the sum of its proper divisors (6518370959).

15918919345 is a wasteful number, since it uses less digits than its factorization.

15918919345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630949 (or 630942 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 55.

The spelling of 15918919345 in words is "fifteen billion, nine hundred eighteen million, nine hundred nineteen thousand, three hundred forty-five".