25965506969 has 4 divisors (see below), whose sum is σ = 26803104000. Its totient is φ = 25127909940.

The previous prime is 25965506953. The next prime is 25965506977. The reversal of 25965506969 is 96960556952.

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 not a de Polignac number, because 25965506969 - 2⁴ = 25965506953 is a prime.

It is a super-2 number, since 2×25965506969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25964506969) 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, 418798469 + ... + 418798530.

It is an arithmetic number, because the mean of its divisors is an integer number (6700776000).

Almost surely, 2^25965506969 is an apocalyptic number.

It is an amenable number.

25965506969 is a deficient number, since it is larger than the sum of its proper divisors (837597031).

25965506969 is an equidigital number, since it uses as much as digits as its factorization.

25965506969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837597030.

The product of its (nonzero) digits is 39366000, while the sum is 62.

The spelling of 25965506969 in words is "twenty-five billion, nine hundred sixty-five million, five hundred six thousand, nine hundred sixty-nine".