25965568271 has 2 divisors, whose sum is σ = 25965568272. Its totient is φ = 25965568270.

The previous prime is 25965568219. The next prime is 25965568313. The reversal of 25965568271 is 17286556952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25965568271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25965568471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12982784135 + 12982784136.

It is an arithmetic number, because the mean of its divisors is an integer number (12982784136).

Almost surely, 2^25965568271 is an apocalyptic number.

25965568271 is a deficient number, since it is larger than the sum of its proper divisors (1).

25965568271 is an equidigital number, since it uses as much as digits as its factorization.

25965568271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 56.

The spelling of 25965568271 in words is "twenty-five billion, nine hundred sixty-five million, five hundred sixty-eight thousand, two hundred seventy-one".