13565664613 has 4 divisors (see below), whose sum is σ = 13615722688. Its totient is φ = 13515606540.

The previous prime is 13565664601. The next prime is 13565664643. The reversal of 13565664613 is 31646656531.

It is a happy number.

13565664613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13565664613 - 2¹³ = 13565656421 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 (13565664643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25028631 + ... + 25029172.

It is an arithmetic number, because the mean of its divisors is an integer number (3403930672).

Almost surely, 2^13565664613 is an apocalyptic number.

It is an amenable number.

13565664613 is a deficient number, since it is larger than the sum of its proper divisors (50058075).

13565664613 is an equidigital number, since it uses as much as digits as its factorization.

13565664613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50058074.

The product of its digits is 1166400, while the sum is 46.

The spelling of 13565664613 in words is "thirteen billion, five hundred sixty-five million, six hundred sixty-four thousand, six hundred thirteen".