25913440367317 has 2 divisors, whose sum is σ = 25913440367318. Its totient is φ = 25913440367316.

The previous prime is 25913440367141. The next prime is 25913440367323. The reversal of 25913440367317 is 71376304431952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24658236078436 + 1255204288881 = 4965706^2 + 1120359^2 .

It is a cyclic number.

It is not a de Polignac number, because 25913440367317 - 2¹⁵ = 25913440334549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25913440367117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12956720183658 + 12956720183659.

It is an arithmetic number, because the mean of its divisors is an integer number (12956720183659).

Almost surely, 2^{25913440367317} is an apocalyptic number.

It is an amenable number.

25913440367317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25913440367317 is an equidigital number, since it uses as much as digits as its factorization.

25913440367317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 55.

The spelling of 25913440367317 in words is "twenty-five trillion, nine hundred thirteen billion, four hundred forty million, three hundred sixty-seven thousand, three hundred seventeen".