22164631945 has 8 divisors (see below), whose sum is σ = 26599203144. Its totient is φ = 17730609024.

The previous prime is 22164631913. The next prime is 22164631961. The reversal of 22164631945 is 54913646122.

It can be written as a sum of positive squares in 4 ways, for example, as 2694336649 + 19470295296 = 51907^2 + 139536^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22164631945 - 2⁵ = 22164631913 is a prime.

It is a Duffinian number.

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, 42154 + ... + 214723.

It is an arithmetic number, because the mean of its divisors is an integer number (3324900393).

Almost surely, 2^22164631945 is an apocalyptic number.

It is an amenable number.

22164631945 is a deficient number, since it is larger than the sum of its proper divisors (4434571199).

22164631945 is a wasteful number, since it uses less digits than its factorization.

22164631945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274139.

The product of its digits is 311040, while the sum is 43.

The spelling of 22164631945 in words is "twenty-two billion, one hundred sixty-four million, six hundred thirty-one thousand, nine hundred forty-five".