25725564 has 72 divisors (see below), whose sum is σ = 67420080. Its totient is φ = 8266752.

The previous prime is 25725559. The next prime is 25725571. The reversal of 25725564 is 46552752.

25725564 is a `hidden beast` number, since 25 + 72 + 5 + 564 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185007 + ... + 185145.

It is an arithmetic number, because the mean of its divisors is an integer number (936390).

Almost surely, 2^25725564 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 25725564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33710040).

25725564 is an abundant number, since it is smaller than the sum of its proper divisors (41694516).

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

25725564 is a wasteful number, since it uses less digits than its factorization.

25725564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 294 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 25725564 is about 5072.0374604295. The cubic root of 25725564 is about 295.2035901914.

The spelling of 25725564 in words is "twenty-five million, seven hundred twenty-five thousand, five hundred sixty-four".