25919368589 has 2 divisors, whose sum is σ = 25919368590. Its totient is φ = 25919368588.

The previous prime is 25919368583. The next prime is 25919368609. The reversal of 25919368589 is 98586391952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18801071689 + 7118296900 = 137117^2 + 84370^2 .

It is a cyclic number.

It is not a de Polignac number, because 25919368589 - 2²⁰ = 25918320013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25919368583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12959684294 + 12959684295.

It is an arithmetic number, because the mean of its divisors is an integer number (12959684295).

Almost surely, 2^25919368589 is an apocalyptic number.

It is an amenable number.

25919368589 is a deficient number, since it is larger than the sum of its proper divisors (1).

25919368589 is an equidigital number, since it uses as much as digits as its factorization.

25919368589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41990400, while the sum is 65.

The spelling of 25919368589 in words is "twenty-five billion, nine hundred nineteen million, three hundred sixty-eight thousand, five hundred eighty-nine".