25655623 has 4 divisors (see below), whose sum is σ = 29320720. Its totient is φ = 21990528.

The previous prime is 25655611. The next prime is 25655629. The reversal of 25655623 is 32655652.

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

It is a de Polignac number, because none of the positive numbers 2^k-25655623 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 (25655629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832538 + ... + 1832551.

It is an arithmetic number, because the mean of its divisors is an integer number (7330180).

Almost surely, 2^25655623 is an apocalyptic number.

25655623 is a deficient number, since it is larger than the sum of its proper divisors (3665097).

25655623 is an equidigital number, since it uses as much as digits as its factorization.

25655623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665096.

The product of its digits is 54000, while the sum is 34.

The square root of 25655623 is about 5065.1380040429. The cubic root of 25655623 is about 294.9358205686.

The spelling of 25655623 in words is "twenty-five million, six hundred fifty-five thousand, six hundred twenty-three".