25422273618 has 32 divisors (see below), whose sum is σ = 58122766464. Its totient is φ = 7261667712.

The previous prime is 25422273593. The next prime is 25422273631. The reversal of 25422273618 is 81637222452.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 25422273618.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95796 + ... + 244992.

It is an arithmetic number, because the mean of its divisors is an integer number (1816336452).

Almost surely, 2^25422273618 is an apocalyptic number.

25422273618 is an abundant number, since it is smaller than the sum of its proper divisors (32700492846).

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

25422273618 is a wasteful number, since it uses less digits than its factorization.

25422273618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153266.

The product of its digits is 322560, while the sum is 42.

The spelling of 25422273618 in words is "twenty-five billion, four hundred twenty-two million, two hundred seventy-three thousand, six hundred eighteen".