135568013579 has 4 divisors (see below), whose sum is σ = 139232013984. Its totient is φ = 131904013176.

The previous prime is 135568013573. The next prime is 135568013591. The reversal of 135568013579 is 975310865531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135568013579 - 2²⁰ = 135566965003 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 135568013579.

It is not an unprimeable number, because it can be changed into a prime (135568013573) 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, 1832000147 + ... + 1832000220.

It is an arithmetic number, because the mean of its divisors is an integer number (34808003496).

Almost surely, 2^135568013579 is an apocalyptic number.

135568013579 is a deficient number, since it is larger than the sum of its proper divisors (3664000405).

135568013579 is an equidigital number, since it uses as much as digits as its factorization.

135568013579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664000404.

The product of its (nonzero) digits is 3402000, while the sum is 53.

The spelling of 135568013579 in words is "one hundred thirty-five billion, five hundred sixty-eight million, thirteen thousand, five hundred seventy-nine".