25969339609 has 2 divisors, whose sum is σ = 25969339610. Its totient is φ = 25969339608.

The previous prime is 25969339589. The next prime is 25969339651. The reversal of 25969339609 is 90693396952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22248705600 + 3720634009 = 149160^2 + 60997^2 .

It is a cyclic number.

It is not a de Polignac number, because 25969339609 - 2¹³ = 25969331417 is a prime.

It is not a weakly prime, because it can be changed into another prime (25969339679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12984669804 + 12984669805.

It is an arithmetic number, because the mean of its divisors is an integer number (12984669805).

Almost surely, 2^25969339609 is an apocalyptic number.

It is an amenable number.

25969339609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25969339609 is an equidigital number, since it uses as much as digits as its factorization.

25969339609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21257640, while the sum is 61.

The spelling of 25969339609 in words is "twenty-five billion, nine hundred sixty-nine million, three hundred thirty-nine thousand, six hundred nine".