12517322849 has 2 divisors, whose sum is σ = 12517322850. Its totient is φ = 12517322848.

The previous prime is 12517322827. The next prime is 12517322861. The reversal of 12517322849 is 94822371521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10579562449 + 1937760400 = 102857^2 + 44020^2 .

It is a cyclic number.

It is not a de Polignac number, because 12517322849 - 2⁸ = 12517322593 is a prime.

It is not a weakly prime, because it can be changed into another prime (12517322249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258661424 + 6258661425.

It is an arithmetic number, because the mean of its divisors is an integer number (6258661425).

Almost surely, 2^12517322849 is an apocalyptic number.

It is an amenable number.

12517322849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517322849 is an equidigital number, since it uses as much as digits as its factorization.

12517322849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The spelling of 12517322849 in words is "twelve billion, five hundred seventeen million, three hundred twenty-two thousand, eight hundred forty-nine".