12644251332613 has 2 divisors, whose sum is σ = 12644251332614. Its totient is φ = 12644251332612.

The previous prime is 12644251332577. The next prime is 12644251332637. The reversal of 12644251332613 is 31623315244621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12021038976769 + 623212355844 = 3467137^2 + 789438^2 .

It is an emirp because it is prime and its reverse (31623315244621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12644251332613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12644251332613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12644251335613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322125666306 + 6322125666307.

It is an arithmetic number, because the mean of its divisors is an integer number (6322125666307).

Almost surely, 2^{12644251332613} is an apocalyptic number.

It is an amenable number.

12644251332613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12644251332613 is an equidigital number, since it uses as much as digits as its factorization.

12644251332613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 43.

The spelling of 12644251332613 in words is "twelve trillion, six hundred forty-four billion, two hundred fifty-one million, three hundred thirty-two thousand, six hundred thirteen".