25648559 has 4 divisors (see below), whose sum is σ = 25659216. Its totient is φ = 25637904.

The previous prime is 25648547. The next prime is 25648561. The reversal of 25648559 is 95584652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25648559 - 2⁴ = 25648543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25648459) 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, 182 + ... + 7164.

It is an arithmetic number, because the mean of its divisors is an integer number (6414804).

Almost surely, 2^25648559 is an apocalyptic number.

25648559 is a deficient number, since it is larger than the sum of its proper divisors (10657).

25648559 is an equidigital number, since it uses as much as digits as its factorization.

25648559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10656.

The product of its digits is 432000, while the sum is 44.

The square root of 25648559 is about 5064.4406403867. The cubic root of 25648559 is about 294.9087489479.

The spelling of 25648559 in words is "twenty-five million, six hundred forty-eight thousand, five hundred fifty-nine".