25655563 has 8 divisors (see below), whose sum is σ = 26685296. Its totient is φ = 24645600.

The previous prime is 25655543. The next prime is 25655611. The reversal of 25655563 is 36555652.

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

It is a cyclic number.

It is not a de Polignac number, because 25655563 - 2¹³ = 25647371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25655503) 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 7 ways as a sum of consecutive naturals, for example, 2268 + ... + 7513.

It is an arithmetic number, because the mean of its divisors is an integer number (3335662).

Almost surely, 2^25655563 is an apocalyptic number.

25655563 is a deficient number, since it is larger than the sum of its proper divisors (1029733).

25655563 is an equidigital number, since it uses as much as digits as its factorization.

25655563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9885.

The product of its digits is 135000, while the sum is 37.

The square root of 25655563 is about 5065.1320811999. The cubic root of 25655563 is about 294.9355906494.

It can be divided in two parts, 2565 and 5563, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 25655563 in words is "twenty-five million, six hundred fifty-five thousand, five hundred sixty-three".