25890012569 has 2 divisors, whose sum is σ = 25890012570. Its totient is φ = 25890012568.

The previous prime is 25890012529. The next prime is 25890012571. The reversal of 25890012569 is 96521009852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25773091600 + 116920969 = 160540^2 + 10813^2 .

It is a cyclic number.

It is not a de Polignac number, because 25890012569 - 2²⁰ = 25888963993 is a prime.

It is a super-2 number, since 2×25890012569² (a number of 22 digits) contains 22 as substring.

Together with 25890012571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25890012529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12945006284 + 12945006285.

It is an arithmetic number, because the mean of its divisors is an integer number (12945006285).

Almost surely, 2^25890012569 is an apocalyptic number.

It is an amenable number.

25890012569 is a deficient number, since it is larger than the sum of its proper divisors (1).

25890012569 is an equidigital number, since it uses as much as digits as its factorization.

25890012569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 25890012569 in words is "twenty-five billion, eight hundred ninety million, twelve thousand, five hundred sixty-nine".