12517726849 has 2 divisors, whose sum is σ = 12517726850. Its totient is φ = 12517726848.

The previous prime is 12517726831. The next prime is 12517726873. The reversal of 12517726849 is 94862771521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12447418624 + 70308225 = 111568^2 + 8385^2 .

It is a cyclic number.

It is not a de Polignac number, because 12517726849 - 2²¹ = 12515629697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12517726796 and 12517726805.

It is not a weakly prime, because it can be changed into another prime (12517726829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258863424 + 6258863425.

It is an arithmetic number, because the mean of its divisors is an integer number (6258863425).

Almost surely, 2^12517726849 is an apocalyptic number.

It is an amenable number.

12517726849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517726849 is an equidigital number, since it uses as much as digits as its factorization.

12517726849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The spelling of 12517726849 in words is "twelve billion, five hundred seventeen million, seven hundred twenty-six thousand, eight hundred forty-nine".