25507655 has 4 divisors (see below), whose sum is σ = 30609192. Its totient is φ = 20406120.

The previous prime is 25507631. The next prime is 25507663. The reversal of 25507655 is 55670552.

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

It is not a de Polignac number, because 25507655 - 2⁸ = 25507399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2550761 + ... + 2550770.

It is an arithmetic number, because the mean of its divisors is an integer number (7652298).

Almost surely, 2^25507655 is an apocalyptic number.

25507655 is a deficient number, since it is larger than the sum of its proper divisors (5101537).

25507655 is an equidigital number, since it uses as much as digits as its factorization.

25507655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101536.

The product of its (nonzero) digits is 52500, while the sum is 35.

The square root of 25507655 is about 5050.5103702497. The cubic root of 25507655 is about 294.3677159618.

It can be divided in two parts, 25507 and 655, that added together give a palindrome (26162).

The spelling of 25507655 in words is "twenty-five million, five hundred seven thousand, six hundred fifty-five".