25564896 has 120 divisors (see below), whose sum is σ = 85987440. Its totient is φ = 7299072.

The previous prime is 25564879. The next prime is 25564907. The reversal of 25564896 is 69846552.

25564896 is a `hidden beast` number, since 2 + 5 + 564 + 89 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17440 + ... + 18848.

It is an arithmetic number, because the mean of its divisors is an integer number (716562).

Almost surely, 2^25564896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25564896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42993720).

25564896 is an abundant number, since it is smaller than the sum of its proper divisors (60422544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25564896 is a wasteful number, since it uses less digits than its factorization.

25564896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1421 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 25564896 is about 5056.1740476372. The cubic root of 25564896 is about 294.5877455175.

The spelling of 25564896 in words is "twenty-five million, five hundred sixty-four thousand, eight hundred ninety-six".