12644251332577 has 2 divisors, whose sum is σ = 12644251332578. Its totient is φ = 12644251332576.

The previous prime is 12644251332569. The next prime is 12644251332613. The reversal of 12644251332577 is 77523315244621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9947154595921 + 2697096736656 = 3153911^2 + 1642284^2 .

It is a cyclic number.

It is not a de Polignac number, because 12644251332577 - 2³ = 12644251332569 is a prime.

It is a super-2 number, since 2×12644251332577² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12644251330577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322125666288 + 6322125666289.

It is an arithmetic number, because the mean of its divisors is an integer number (6322125666289).

Almost surely, 2^{12644251332577} is an apocalyptic number.

It is an amenable number.

12644251332577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12644251332577 is an equidigital number, since it uses as much as digits as its factorization.

12644251332577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 52.

The spelling of 12644251332577 in words is "twelve trillion, six hundred forty-four billion, two hundred fifty-one million, three hundred thirty-two thousand, five hundred seventy-seven".