12517527257 has 2 divisors, whose sum is σ = 12517527258. Its totient is φ = 12517527256.

The previous prime is 12517527247. The next prime is 12517527299. The reversal of 12517527257 is 75272571521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10116135241 + 2401392016 = 100579^2 + 49004^2 .

It is a cyclic number.

It is not a de Polignac number, because 12517527257 - 2¹⁶ = 12517461721 is a prime.

It is not a weakly prime, because it can be changed into another prime (12517527247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258763628 + 6258763629.

It is an arithmetic number, because the mean of its divisors is an integer number (6258763629).

Almost surely, 2^12517527257 is an apocalyptic number.

It is an amenable number.

12517527257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517527257 is an equidigital number, since it uses as much as digits as its factorization.

12517527257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 343000, while the sum is 44.

The spelling of 12517527257 in words is "twelve billion, five hundred seventeen million, five hundred twenty-seven thousand, two hundred fifty-seven".