25564455 has 24 divisors (see below), whose sum is σ = 50642592. Its totient is φ = 11686464.

The previous prime is 25564439. The next prime is 25564459. The reversal of 25564455 is 55446552.

25564455 is a `hidden beast` number, since 2 + 5 + 5 + 644 + 5 + 5 = 666.

It is not a de Polignac number, because 25564455 - 2⁴ = 25564439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25564459) by changing a digit.

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, 40264 + ... + 40893.

It is an arithmetic number, because the mean of its divisors is an integer number (2110108).

Almost surely, 2^25564455 is an apocalyptic number.

25564455 is a deficient number, since it is larger than the sum of its proper divisors (25078137).

25564455 is a wasteful number, since it uses less digits than its factorization.

25564455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81175 (or 81172 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 25564455 is about 5056.1304373997. The cubic root of 25564455 is about 294.5860516070.

The spelling of 25564455 in words is "twenty-five million, five hundred sixty-four thousand, four hundred fifty-five".