15328731109 has 4 divisors (see below), whose sum is σ = 15522765760. Its totient is φ = 15134696460.

The previous prime is 15328731097. The next prime is 15328731127. The reversal of 15328731109 is 90113782351.

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 15328731109 - 2⁷ = 15328730981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15328701109) 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, 97017207 + ... + 97017364.

It is an arithmetic number, because the mean of its divisors is an integer number (3880691440).

Almost surely, 2^15328731109 is an apocalyptic number.

It is an amenable number.

15328731109 is a deficient number, since it is larger than the sum of its proper divisors (194034651).

15328731109 is an equidigital number, since it uses as much as digits as its factorization.

15328731109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194034650.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 15328731109 in words is "fifteen billion, three hundred twenty-eight million, seven hundred thirty-one thousand, one hundred nine".