22170621609 has 12 divisors (see below), whose sum is σ = 32410066416. Its totient is φ = 14602336632.

The previous prime is 22170621607. The next prime is 22170621617. The reversal of 22170621609 is 90612607122.

22170621609 is a `hidden beast` number, since 2 + 21 + 7 + 0 + 6 + 21 + 609 = 666.

It is not a de Polignac number, because 22170621609 - 2¹ = 22170621607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22170621607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14839027 + ... + 14840520.

It is an arithmetic number, because the mean of its divisors is an integer number (2700838868).

Almost surely, 2^22170621609 is an apocalyptic number.

It is an amenable number.

22170621609 is a deficient number, since it is larger than the sum of its proper divisors (10239444807).

22170621609 is a wasteful number, since it uses less digits than its factorization.

22170621609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29679636 (or 29679633 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

It can be divided in two parts, 2217062 and 1609, that added together give a triangular number (2218671 = T₂₁₀₆).

The spelling of 22170621609 in words is "twenty-two billion, one hundred seventy million, six hundred twenty-one thousand, six hundred nine".