12156265065 has 16 divisors (see below), whose sum is σ = 22228599168. Its totient is φ = 5557149696.

The previous prime is 12156265061. The next prime is 12156265139. The reversal of 12156265065 is 56056265121.

It is a happy number.

It is not a de Polignac number, because 12156265065 - 2² = 12156265061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12156265061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57886872 + ... + 57887081.

It is an arithmetic number, because the mean of its divisors is an integer number (1389287448).

Almost surely, 2^12156265065 is an apocalyptic number.

12156265065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12156265065 is a deficient number, since it is larger than the sum of its proper divisors (10072334103).

12156265065 is a wasteful number, since it uses less digits than its factorization.

12156265065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115773968.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 12156265065 in words is "twelve billion, one hundred fifty-six million, two hundred sixty-five thousand, sixty-five".