12165565364 has 12 divisors (see below), whose sum is σ = 22542077124. Its totient is φ = 5724971904.

The previous prime is 12165565327. The next prime is 12165565369. The reversal of 12165565364 is 46356556121.

It can be written as a sum of positive squares in 2 ways, for example, as 6564240400 + 5601324964 = 81020^2 + 74842^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165565369) 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, 89452619 + ... + 89452754.

It is an arithmetic number, because the mean of its divisors is an integer number (1878506427).

Almost surely, 2^12165565364 is an apocalyptic number.

It is an amenable number.

12165565364 is a deficient number, since it is larger than the sum of its proper divisors (10376511760).

12165565364 is a wasteful number, since it uses less digits than its factorization.

12165565364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178905394 (or 178905392 counting only the distinct ones).

The product of its digits is 648000, while the sum is 44.

The spelling of 12165565364 in words is "twelve billion, one hundred sixty-five million, five hundred sixty-five thousand, three hundred sixty-four".