22195843865 has 8 divisors (see below), whose sum is σ = 28683859848. Its totient is φ = 16390776960.

The previous prime is 22195843777. The next prime is 22195843933. The reversal of 22195843865 is 56834859122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 141514816 + 22054329049 = 11896^2 + 148507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22195843865 - 2²⁶ = 22128735001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 170737196 + ... + 170737325.

It is an arithmetic number, because the mean of its divisors is an integer number (3585482481).

Almost surely, 2^22195843865 is an apocalyptic number.

It is an amenable number.

22195843865 is a deficient number, since it is larger than the sum of its proper divisors (6488015983).

22195843865 is a wasteful number, since it uses less digits than its factorization.

22195843865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341474539.

The product of its digits is 4147200, while the sum is 53.

The spelling of 22195843865 in words is "twenty-two billion, one hundred ninety-five million, eight hundred forty-three thousand, eight hundred sixty-five".