15109772688961 has 4 divisors (see below), whose sum is σ = 15143880528432. Its totient is φ = 15075664849492.

The previous prime is 15109772688953. The next prime is 15109772689007. The reversal of 15109772688961 is 16988627790151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15109772688961 - 2³ = 15109772688953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15109772688931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17053919071 + ... + 17053919956.

It is an arithmetic number, because the mean of its divisors is an integer number (3785970132108).

Almost surely, 2^{15109772688961} is an apocalyptic number.

It is an amenable number.

15109772688961 is a deficient number, since it is larger than the sum of its proper divisors (34107839471).

15109772688961 is an equidigital number, since it uses as much as digits as its factorization.

15109772688961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34107839470.

The product of its (nonzero) digits is 91445760, while the sum is 70.

The spelling of 15109772688961 in words is "fifteen trillion, one hundred nine billion, seven hundred seventy-two million, six hundred eighty-eight thousand, nine hundred sixty-one".