25808053309 has 2 divisors, whose sum is σ = 25808053310. Its totient is φ = 25808053308.

The previous prime is 25808053307. The next prime is 25808053357. The reversal of 25808053309 is 90335080852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16236366084 + 9571687225 = 127422^2 + 97835^2 .

It is a cyclic number.

It is not a de Polignac number, because 25808053309 - 2¹ = 25808053307 is a prime.

Together with 25808053307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25808053307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904026654 + 12904026655.

It is an arithmetic number, because the mean of its divisors is an integer number (12904026655).

Almost surely, 2^25808053309 is an apocalyptic number.

It is an amenable number.

25808053309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25808053309 is an equidigital number, since it uses as much as digits as its factorization.

25808053309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 25808053309 in words is "twenty-five billion, eight hundred eight million, fifty-three thousand, three hundred nine".