22168598985 has 24 divisors (see below), whose sum is σ = 41381385864. Its totient is φ = 10913771520.

The previous prime is 22168598971. The next prime is 22168598987. The reversal of 22168598985 is 58989586122.

22168598985 is a `hidden beast` number, since 22 + 16 + 8 + 598 + 9 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 580761801 + 21587837184 = 24099^2 + 146928^2 .

It is not a de Polignac number, because 22168598985 - 2⁵ = 22168598953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22168598987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18946936 + ... + 18948105.

It is an arithmetic number, because the mean of its divisors is an integer number (1724224411).

Almost surely, 2^22168598985 is an apocalyptic number.

It is an amenable number.

22168598985 is a deficient number, since it is larger than the sum of its proper divisors (19212786879).

22168598985 is a wasteful number, since it uses less digits than its factorization.

22168598985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37895065 (or 37895062 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 63.

The spelling of 22168598985 in words is "twenty-two billion, one hundred sixty-eight million, five hundred ninety-eight thousand, nine hundred eighty-five".