12009744565 has 64 divisors (see below), whose sum is σ = 18390822912. Its totient is φ = 7323955200.

The previous prime is 12009744563. The next prime is 12009744569. The reversal of 12009744565 is 56544790021.

It is not a de Polignac number, because 12009744565 - 2¹ = 12009744563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009744563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3397539 + ... + 3401071.

It is an arithmetic number, because the mean of its divisors is an integer number (287356608).

Almost surely, 2^12009744565 is an apocalyptic number.

It is an amenable number.

12009744565 is a deficient number, since it is larger than the sum of its proper divisors (6381078347).

12009744565 is a wasteful number, since it uses less digits than its factorization.

12009744565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 12009744565 in words is "twelve billion, nine million, seven hundred forty-four thousand, five hundred sixty-five".