25655656 has 16 divisors (see below), whose sum is σ = 51804900. Its totient is φ = 11841024.

The previous prime is 25655653. The next prime is 25655659. The reversal of 25655656 is 65655652.

It is an interprime number because it is at equal distance from previous prime (25655653) and next prime (25655659).

It can be written as a sum of positive squares in 2 ways, for example, as 20520900 + 5134756 = 4530^2 + 2266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25655653) 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 3 ways as a sum of consecutive naturals, for example, 123241 + ... + 123448.

Almost surely, 2^25655656 is an apocalyptic number.

25655656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25655656 is an abundant number, since it is smaller than the sum of its proper divisors (26149244).

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

25655656 is a wasteful number, since it uses less digits than its factorization.

25655656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246708 (or 246704 counting only the distinct ones).

The product of its digits is 270000, while the sum is 40.

The square root of 25655656 is about 5065.1412616037. The cubic root of 25655656 is about 294.9359470240.

The spelling of 25655656 in words is "twenty-five million, six hundred fifty-five thousand, six hundred fifty-six".