12744364565 has 4 divisors (see below), whose sum is σ = 15293237484. Its totient is φ = 10195491648.

The previous prime is 12744364559. The next prime is 12744364573. The reversal of 12744364565 is 56546344721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4659837169 + 8084527396 = 68263^2 + 89914^2 .

It is a cyclic number.

It is not a de Polignac number, because 12744364565 - 2¹⁸ = 12744102421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274436452 + ... + 1274436461.

It is an arithmetic number, because the mean of its divisors is an integer number (3823309371).

Almost surely, 2^12744364565 is an apocalyptic number.

It is an amenable number.

12744364565 is a deficient number, since it is larger than the sum of its proper divisors (2548872919).

12744364565 is an equidigital number, since it uses as much as digits as its factorization.

12744364565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548872918.

The product of its digits is 2419200, while the sum is 47.

The spelling of 12744364565 in words is "twelve billion, seven hundred forty-four million, three hundred sixty-four thousand, five hundred sixty-five".