13501397257 has 2 divisors, whose sum is σ = 13501397258. Its totient is φ = 13501397256.

The previous prime is 13501397243. The next prime is 13501397303. The reversal of 13501397257 is 75279310531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13338171081 + 163226176 = 115491^2 + 12776^2 .

It is a cyclic number.

It is not a de Polignac number, because 13501397257 - 2²³ = 13493008649 is a prime.

It is not a weakly prime, because it can be changed into another prime (13501397227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6750698628 + 6750698629.

It is an arithmetic number, because the mean of its divisors is an integer number (6750698629).

Almost surely, 2^13501397257 is an apocalyptic number.

It is an amenable number.

13501397257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13501397257 is an equidigital number, since it uses as much as digits as its factorization.

13501397257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 43.

The spelling of 13501397257 in words is "thirteen billion, five hundred one million, three hundred ninety-seven thousand, two hundred fifty-seven".