25955255969 has 2 divisors, whose sum is σ = 25955255970. Its totient is φ = 25955255968.

The previous prime is 25955255927. The next prime is 25955255999. The reversal of 25955255969 is 96955255952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20602870369 + 5352385600 = 143537^2 + 73160^2 .

It is a cyclic number.

It is not a de Polignac number, because 25955255969 - 2¹⁶ = 25955190433 is a prime.

It is a super-2 number, since 2×25955255969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25955255999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12977627984 + 12977627985.

It is an arithmetic number, because the mean of its divisors is an integer number (12977627985).

Almost surely, 2^25955255969 is an apocalyptic number.

It is an amenable number.

25955255969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25955255969 is an equidigital number, since it uses as much as digits as its factorization.

25955255969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54675000, while the sum is 62.

The spelling of 25955255969 in words is "twenty-five billion, nine hundred fifty-five million, two hundred fifty-five thousand, nine hundred sixty-nine".