12665256205 has 16 divisors (see below), whose sum is σ = 17372962944. Its totient is φ = 8683012800.

The previous prime is 12665256203. The next prime is 12665256257. The reversal of 12665256205 is 50265256621.

It is not a de Polignac number, because 12665256205 - 2¹ = 12665256203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665256203) 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, 156030 + ... + 222880.

It is an arithmetic number, because the mean of its divisors is an integer number (1085810184).

Almost surely, 2^12665256205 is an apocalyptic number.

It is an amenable number.

12665256205 is a deficient number, since it is larger than the sum of its proper divisors (4707706739).

12665256205 is an equidigital number, since it uses as much as digits as its factorization.

12665256205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72276.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 12665256205 in words is "twelve billion, six hundred sixty-five million, two hundred fifty-six thousand, two hundred five".