12165561244 has 6 divisors (see below), whose sum is σ = 21289732184. Its totient is φ = 6082780620.

The previous prime is 12165561217. The next prime is 12165561251. The reversal of 12165561244 is 44216556121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1520695152 + ... + 1520695159.

Almost surely, 2^12165561244 is an apocalyptic number.

It is an amenable number.

12165561244 is a deficient number, since it is larger than the sum of its proper divisors (9124170940).

12165561244 is a wasteful number, since it uses less digits than its factorization.

12165561244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041390315 (or 3041390313 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The spelling of 12165561244 in words is "twelve billion, one hundred sixty-five million, five hundred sixty-one thousand, two hundred forty-four".