25563820589 has 2 divisors, whose sum is σ = 25563820590. Its totient is φ = 25563820588.

The previous prime is 25563820549. The next prime is 25563820609. The reversal of 25563820589 is 98502836552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17036775625 + 8527044964 = 130525^2 + 92342^2 .

It is a cyclic number.

It is not a de Polignac number, because 25563820589 - 2¹² = 25563816493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25563820589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25563820549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12781910294 + 12781910295.

It is an arithmetic number, because the mean of its divisors is an integer number (12781910295).

Almost surely, 2^25563820589 is an apocalyptic number.

It is an amenable number.

25563820589 is a deficient number, since it is larger than the sum of its proper divisors (1).

25563820589 is an equidigital number, since it uses as much as digits as its factorization.

25563820589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 25563820589 in words is "twenty-five billion, five hundred sixty-three million, eight hundred twenty thousand, five hundred eighty-nine".