25705504717 has 2 divisors, whose sum is σ = 25705504718. Its totient is φ = 25705504716.

The previous prime is 25705504639. The next prime is 25705504733. The reversal of 25705504717 is 71740550752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25252070281 + 453434436 = 158909^2 + 21294^2 .

It is a cyclic number.

It is not a de Polignac number, because 25705504717 - 2¹⁹ = 25704980429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25705507717) 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, 12852752358 + 12852752359.

It is an arithmetic number, because the mean of its divisors is an integer number (12852752359).

Almost surely, 2^25705504717 is an apocalyptic number.

It is an amenable number.

25705504717 is a deficient number, since it is larger than the sum of its proper divisors (1).

25705504717 is an equidigital number, since it uses as much as digits as its factorization.

25705504717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 343000, while the sum is 43.

The spelling of 25705504717 in words is "twenty-five billion, seven hundred five million, five hundred four thousand, seven hundred seventeen".