12613660265 has 4 divisors (see below), whose sum is σ = 15136392324. Its totient is φ = 10090928208.

The previous prime is 12613660249. The next prime is 12613660271. The reversal of 12613660265 is 56206631621.

It is a happy number.

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 4107656281 + 8506003984 = 64091^2 + 92228^2 .

It is a cyclic number.

It is not a de Polignac number, because 12613660265 - 2⁴ = 12613660249 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, 1261366022 + ... + 1261366031.

It is an arithmetic number, because the mean of its divisors is an integer number (3784098081).

Almost surely, 2^12613660265 is an apocalyptic number.

It is an amenable number.

12613660265 is a deficient number, since it is larger than the sum of its proper divisors (2522732059).

12613660265 is an equidigital number, since it uses as much as digits as its factorization.

12613660265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522732058.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 12613660265 in words is "twelve billion, six hundred thirteen million, six hundred sixty thousand, two hundred sixty-five".