25564089 has 8 divisors (see below), whose sum is σ = 34552672. Its totient is φ = 16809120.

The previous prime is 25564069. The next prime is 25564117. The reversal of 25564089 is 98046552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25564089 - 2⁷ = 25563961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25564069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58147 + ... + 58584.

It is an arithmetic number, because the mean of its divisors is an integer number (4319084).

Almost surely, 2^25564089 is an apocalyptic number.

It is an amenable number.

25564089 is a deficient number, since it is larger than the sum of its proper divisors (8988583).

25564089 is a wasteful number, since it uses less digits than its factorization.

25564089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116807.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 25564089 is about 5056.0942435837. The cubic root of 25564089 is about 294.5846457616.

The spelling of 25564089 in words is "twenty-five million, five hundred sixty-four thousand, eighty-nine".