25965568289 has 4 divisors (see below), whose sum is σ = 25992310320. Its totient is φ = 25938826260.

The previous prime is 25965568271. The next prime is 25965568313. The reversal of 25965568289 is 98286556952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25965568289 - 2²⁴ = 25948791073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25965568219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13369559 + ... + 13371500.

It is an arithmetic number, because the mean of its divisors is an integer number (6498077580).

Almost surely, 2^25965568289 is an apocalyptic number.

It is an amenable number.

25965568289 is a deficient number, since it is larger than the sum of its proper divisors (26742031).

25965568289 is an equidigital number, since it uses as much as digits as its factorization.

25965568289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26742030.

The product of its digits is 93312000, while the sum is 65.

The spelling of 25965568289 in words is "twenty-five billion, nine hundred sixty-five million, five hundred sixty-eight thousand, two hundred eighty-nine".