15791280961 has 4 divisors (see below), whose sum is σ = 15852725892. Its totient is φ = 15729836032.

The previous prime is 15791280881. The next prime is 15791280983. The reversal of 15791280961 is 16908219751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16908219751 = 10193 ⋅1658807.

It can be written as a sum of positive squares in 2 ways, for example, as 13102236225 + 2689044736 = 114465^2 + 51856^2 .

It is a cyclic number.

It is not a de Polignac number, because 15791280961 - 2²⁹ = 15254410049 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15791280761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30722080 + ... + 30722593.

It is an arithmetic number, because the mean of its divisors is an integer number (3963181473).

Almost surely, 2^15791280961 is an apocalyptic number.

It is an amenable number.

15791280961 is a deficient number, since it is larger than the sum of its proper divisors (61444931).

15791280961 is an equidigital number, since it uses as much as digits as its factorization.

15791280961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61444930.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 15791280961 in words is "fifteen billion, seven hundred ninety-one million, two hundred eighty thousand, nine hundred sixty-one".