25724788742717 has 2 divisors, whose sum is σ = 25724788742718. Its totient is φ = 25724788742716.

The previous prime is 25724788742711. The next prime is 25724788742801. The reversal of 25724788742717 is 71724788742752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23273619627076 + 2451169115641 = 4824274^2 + 1565621^2 .

It is a cyclic number.

It is not a de Polignac number, because 25724788742717 - 2²⁸ = 25724520307261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25724788742711) 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, 12862394371358 + 12862394371359.

It is an arithmetic number, because the mean of its divisors is an integer number (12862394371359).

Almost surely, 2^{25724788742717} is an apocalyptic number.

It is an amenable number.

25724788742717 is a deficient number, since it is larger than the sum of its proper divisors (1).

25724788742717 is an equidigital number, since it uses as much as digits as its factorization.

25724788742717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688414720, while the sum is 71.

The spelling of 25724788742717 in words is "twenty-five trillion, seven hundred twenty-four billion, seven hundred eighty-eight million, seven hundred forty-two thousand, seven hundred seventeen".