25655647 has 8 divisors (see below), whose sum is σ = 25961600. Its totient is φ = 25351704.

The previous prime is 25655629. The next prime is 25655653. The reversal of 25655647 is 74655652.

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 25655647 - 2⁷ = 25655519 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 (25655447) 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, 52438 + ... + 52924.

It is an arithmetic number, because the mean of its divisors is an integer number (3245200).

Almost surely, 2^25655647 is an apocalyptic number.

25655647 is a deficient number, since it is larger than the sum of its proper divisors (305953).

25655647 is a wasteful number, since it uses less digits than its factorization.

25655647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005.

The product of its digits is 252000, while the sum is 40.

The square root of 25655647 is about 5065.1403731782. The cubic root of 25655647 is about 294.9359125362.

The spelling of 25655647 in words is "twenty-five million, six hundred fifty-five thousand, six hundred forty-seven".