25630655 has 4 divisors (see below), whose sum is σ = 30756792. Its totient is φ = 20504520.

The previous prime is 25630643. The next prime is 25630687. The reversal of 25630655 is 55603652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25630655 - 2⁸ = 25630399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2563061 + ... + 2563070.

It is an arithmetic number, because the mean of its divisors is an integer number (7689198).

Almost surely, 2^25630655 is an apocalyptic number.

25630655 is a deficient number, since it is larger than the sum of its proper divisors (5126137).

25630655 is an equidigital number, since it uses as much as digits as its factorization.

25630655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126136.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 25630655 is about 5062.6727131032. The cubic root of 25630655 is about 294.8401125345.

The spelling of 25630655 in words is "twenty-five million, six hundred thirty thousand, six hundred fifty-five".