15799491065 has 32 divisors (see below), whose sum is σ = 19674182016. Its totient is φ = 12174023680.

The previous prime is 15799491061. The next prime is 15799491079. The reversal of 15799491065 is 56019499751.

It is not a de Polignac number, because 15799491065 - 2² = 15799491061 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 15799491065.

It is not an unprimeable number, because it can be changed into a prime (15799491061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3201650 + ... + 3206580.

It is an arithmetic number, because the mean of its divisors is an integer number (614818188).

Almost surely, 2^15799491065 is an apocalyptic number.

It is an amenable number.

15799491065 is a deficient number, since it is larger than the sum of its proper divisors (3874690951).

15799491065 is a wasteful number, since it uses less digits than its factorization.

15799491065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209.

The product of its (nonzero) digits is 3061800, while the sum is 56.

The spelling of 15799491065 in words is "fifteen billion, seven hundred ninety-nine million, four hundred ninety-one thousand, sixty-five".