13249716257 has 2 divisors, whose sum is σ = 13249716258. Its totient is φ = 13249716256.

The previous prime is 13249716217. The next prime is 13249716287. The reversal of 13249716257 is 75261794231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9114711841 + 4135004416 = 95471^2 + 64304^2 .

It is a cyclic number.

It is not a de Polignac number, because 13249716257 - 2¹⁶ = 13249650721 is a prime.

It is not a weakly prime, because it can be changed into another prime (13249716217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6624858128 + 6624858129.

It is an arithmetic number, because the mean of its divisors is an integer number (6624858129).

Almost surely, 2^13249716257 is an apocalyptic number.

It is an amenable number.

13249716257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13249716257 is an equidigital number, since it uses as much as digits as its factorization.

13249716257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 47.

The spelling of 13249716257 in words is "thirteen billion, two hundred forty-nine million, seven hundred sixteen thousand, two hundred fifty-seven".