12265340505565 has 32 divisors (see below), whose sum is σ = 18476197816320. Its totient is φ = 7621431580224.

The previous prime is 12265340505563. The next prime is 12265340505577. The reversal of 12265340505565 is 56550504356221.

It is not a de Polignac number, because 12265340505565 - 2¹ = 12265340505563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12265340505563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400943859 + ... + 400974448.

It is an arithmetic number, because the mean of its divisors is an integer number (577381181760).

Almost surely, 2^{12265340505565} is an apocalyptic number.

It is an amenable number.

12265340505565 is a deficient number, since it is larger than the sum of its proper divisors (6210857310755).

12265340505565 is a wasteful number, since it uses less digits than its factorization.

12265340505565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801918361.

The product of its (nonzero) digits is 5400000, while the sum is 49.

The spelling of 12265340505565 in words is "twelve trillion, two hundred sixty-five billion, three hundred forty million, five hundred five thousand, five hundred sixty-five".