25685484618 has 16 divisors (see below), whose sum is σ = 51458490720. Its totient is φ = 8547241296.

The previous prime is 25685484581. The next prime is 25685484653. The reversal of 25685484618 is 81648458652.

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, 3642913 + ... + 3649956.

It is an arithmetic number, because the mean of its divisors is an integer number (3216155670).

Almost surely, 2^25685484618 is an apocalyptic number.

25685484618 is an abundant number, since it is smaller than the sum of its proper divisors (25773006102).

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

25685484618 is a wasteful number, since it uses less digits than its factorization.

25685484618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7293461.

The product of its digits is 14745600, while the sum is 57.

The spelling of 25685484618 in words is "twenty-five billion, six hundred eighty-five million, four hundred eighty-four thousand, six hundred eighteen".