12665256013 has 8 divisors (see below), whose sum is σ = 12719975832. Its totient is φ = 12610629696.

The previous prime is 12665256011. The next prime is 12665256041. The reversal of 12665256013 is 31065256621.

It can be written as a sum of positive squares in 4 ways, for example, as 905588649 + 11759667364 = 30093^2 + 108442^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12665256013 - 2¹ = 12665256011 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 (12665256011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255231 + ... + 300787.

It is an arithmetic number, because the mean of its divisors is an integer number (1589996979).

Almost surely, 2^12665256013 is an apocalyptic number.

It is an amenable number.

12665256013 is a deficient number, since it is larger than the sum of its proper divisors (54719819).

12665256013 is an equidigital number, since it uses as much as digits as its factorization.

12665256013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46751.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 12665256013 in words is "twelve billion, six hundred sixty-five million, two hundred fifty-six thousand, thirteen".