15597313879 has 4 divisors (see below), whose sum is σ = 17825501584. Its totient is φ = 13369126176.

The previous prime is 15597313877. The next prime is 15597313937. The reversal of 15597313879 is 97831379551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97831379551 = 218083 ⋅448597.

It is not a de Polignac number, because 15597313879 - 2¹ = 15597313877 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 (15597313871) 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, 1114093842 + ... + 1114093855.

It is an arithmetic number, because the mean of its divisors is an integer number (4456375396).

Almost surely, 2^15597313879 is an apocalyptic number.

15597313879 is a deficient number, since it is larger than the sum of its proper divisors (2228187705).

15597313879 is an equidigital number, since it uses as much as digits as its factorization.

15597313879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228187704.

The product of its digits is 7144200, while the sum is 58.

It can be divided in two parts, 15597 and 313879, that added together give a square (329476 = 574²).

The spelling of 15597313879 in words is "fifteen billion, five hundred ninety-seven million, three hundred thirteen thousand, eight hundred seventy-nine".