25718535317 has 2 divisors, whose sum is σ = 25718535318. Its totient is φ = 25718535316.

The previous prime is 25718535281. The next prime is 25718535433. The reversal of 25718535317 is 71353581752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24438756241 + 1279779076 = 156329^2 + 35774^2 .

It is a cyclic number.

It is not a de Polignac number, because 25718535317 - 2¹² = 25718531221 is a prime.

It is a super-2 number, since 2×25718535317² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25718535217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859267658 + 12859267659.

It is an arithmetic number, because the mean of its divisors is an integer number (12859267659).

Almost surely, 2^25718535317 is an apocalyptic number.

It is an amenable number.

25718535317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25718535317 is an equidigital number, since it uses as much as digits as its factorization.

25718535317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 47.

The spelling of 25718535317 in words is "twenty-five billion, seven hundred eighteen million, five hundred thirty-five thousand, three hundred seventeen".