25645155 has 16 divisors (see below), whose sum is σ = 43192320. Its totient is φ = 12957408.

The previous prime is 25645141. The next prime is 25645159. The reversal of 25645155 is 55154652.

It is not a de Polignac number, because 25645155 - 2⁹ = 25644643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25645159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44707 + ... + 45276.

It is an arithmetic number, because the mean of its divisors is an integer number (2699520).

Almost surely, 2^25645155 is an apocalyptic number.

25645155 is a deficient number, since it is larger than the sum of its proper divisors (17547165).

25645155 is a wasteful number, since it uses less digits than its factorization.

25645155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90010.

The product of its digits is 30000, while the sum is 33.

The square root of 25645155 is about 5064.1045605319. The cubic root of 25645155 is about 294.8957019018.

The spelling of 25645155 in words is "twenty-five million, six hundred forty-five thousand, one hundred fifty-five".