25564653 has 10 divisors (see below), whose sum is σ = 38189294. Its totient is φ = 17043048.

The previous prime is 25564619. The next prime is 25564667. The reversal of 25564653 is 35646552.

It is a happy number.

25564653 is a `hidden beast` number, since 2 + 5 + 5 + 646 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20820969 + 4743684 = 4563^2 + 2178^2 .

It is not a de Polignac number, because 25564653 - 2⁶ = 25564589 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 (25565653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 157726 + ... + 157887.

Almost surely, 2^25564653 is an apocalyptic number.

It is an amenable number.

25564653 is a deficient number, since it is larger than the sum of its proper divisors (12624641).

25564653 is an equidigital number, since it uses as much as digits as its factorization.

25564653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315625 (or 315616 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 25564653 is about 5056.1500175529. The cubic root of 25564653 is about 294.5868121406.

It can be divided in two parts, 2 and 5564653, that added together give a palindrome (5564655).

The spelling of 25564653 in words is "twenty-five million, five hundred sixty-four thousand, six hundred fifty-three".