12165112445065 has 4 divisors (see below), whose sum is σ = 14598134934084. Its totient is φ = 9732089956048.

The previous prime is 12165112445051. The next prime is 12165112445071. The reversal of 12165112445065 is 56054421156121.

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 3117240956041 + 9047871489024 = 1765571^2 + 3007968^2 .

It is a cyclic number.

It is not a de Polignac number, because 12165112445065 - 2⁹ = 12165112444553 is a prime.

It is a Duffinian 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, 1216511244502 + ... + 1216511244511.

It is an arithmetic number, because the mean of its divisors is an integer number (3649533733521).

Almost surely, 2^{12165112445065} is an apocalyptic number.

It is an amenable number.

12165112445065 is a deficient number, since it is larger than the sum of its proper divisors (2433022489019).

12165112445065 is an equidigital number, since it uses as much as digits as its factorization.

12165112445065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433022489018.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 12165112445065 in words is "twelve trillion, one hundred sixty-five billion, one hundred twelve million, four hundred forty-five thousand, sixty-five".