12544350517 has 2 divisors, whose sum is σ = 12544350518. Its totient is φ = 12544350516.

The previous prime is 12544350509. The next prime is 12544350557. The reversal of 12544350517 is 71505344521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8166013956 + 4378336561 = 90366^2 + 66169^2 .

It is a cyclic number.

It is not a de Polignac number, because 12544350517 - 2³ = 12544350509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12544350557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272175258 + 6272175259.

It is an arithmetic number, because the mean of its divisors is an integer number (6272175259).

Almost surely, 2^12544350517 is an apocalyptic number.

It is an amenable number.

12544350517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12544350517 is an equidigital number, since it uses as much as digits as its factorization.

12544350517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 12544350517 in words is "twelve billion, five hundred forty-four million, three hundred fifty thousand, five hundred seventeen".