12257535391 has 2 divisors, whose sum is σ = 12257535392. Its totient is φ = 12257535390.

The previous prime is 12257535373. The next prime is 12257535403. The reversal of 12257535391 is 19353575221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12257535391 - 2⁷ = 12257535263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12257535361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128767695 + 6128767696.

It is an arithmetic number, because the mean of its divisors is an integer number (6128767696).

Almost surely, 2^12257535391 is an apocalyptic number.

12257535391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257535391 is an equidigital number, since it uses as much as digits as its factorization.

12257535391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283500, while the sum is 43.

The spelling of 12257535391 in words is "twelve billion, two hundred fifty-seven million, five hundred thirty-five thousand, three hundred ninety-one".