25664521295 has 16 divisors (see below), whose sum is σ = 35308104768. Its totient is φ = 17543005440.

The previous prime is 25664521247. The next prime is 25664521321. The reversal of 25664521295 is 59212546652.

It is not a de Polignac number, because 25664521295 - 2⁶ = 25664521231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1145486 + ... + 1167675.

It is an arithmetic number, because the mean of its divisors is an integer number (2206756548).

Almost surely, 2^25664521295 is an apocalyptic number.

25664521295 is a deficient number, since it is larger than the sum of its proper divisors (9643583473).

25664521295 is a wasteful number, since it uses less digits than its factorization.

25664521295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313490.

The product of its digits is 1296000, while the sum is 47.

The spelling of 25664521295 in words is "twenty-five billion, six hundred sixty-four million, five hundred twenty-one thousand, two hundred ninety-five".