25957238399 has 2 divisors, whose sum is σ = 25957238400. Its totient is φ = 25957238398.

The previous prime is 25957238393. The next prime is 25957238407. The reversal of 25957238399 is 99383275952.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25957238399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25957238393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12978619199 + 12978619200.

It is an arithmetic number, because the mean of its divisors is an integer number (12978619200).

Almost surely, 2^25957238399 is an apocalyptic number.

25957238399 is a deficient number, since it is larger than the sum of its proper divisors (1).

25957238399 is an equidigital number, since it uses as much as digits as its factorization.

25957238399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 62.

The spelling of 25957238399 in words is "twenty-five billion, nine hundred fifty-seven million, two hundred thirty-eight thousand, three hundred ninety-nine".