25965618 has 16 divisors (see below), whose sum is σ = 59350080. Its totient is φ = 7418736.

The previous prime is 25965607. The next prime is 25965629. The reversal of 25965618 is 81656952.

It is an interprime number because it is at equal distance from previous prime (25965607) and next prime (25965629).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 618229 = 25965618 / (2 + 5 + 9 + 6 + 5 + 6 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 25965618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309073 + ... + 309156.

It is an arithmetic number, because the mean of its divisors is an integer number (3709380).

Almost surely, 2^25965618 is an apocalyptic number.

25965618 is an abundant number, since it is smaller than the sum of its proper divisors (33384462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25965618 is a wasteful number, since it uses less digits than its factorization.

25965618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618241.

The product of its digits is 129600, while the sum is 42.

The square root of 25965618 is about 5095.6469657935. The cubic root of 25965618 is about 296.1189639296.

The spelling of 25965618 in words is "twenty-five million, nine hundred sixty-five thousand, six hundred eighteen".