164565009 has 12 divisors (see below), whose sum is σ = 271662976. Its totient is φ = 94037112.

The previous prime is 164564969. The next prime is 164565029. The reversal of 164565009 is 900565461.

164565009 is a `hidden beast` number, since 1 + 645 + 6 + 5 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 164565009 - 2⁹ = 164564497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164565029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1306009 + ... + 1306134.

Almost surely, 2^164565009 is an apocalyptic number.

It is an amenable number.

164565009 is a deficient number, since it is larger than the sum of its proper divisors (107097967).

164565009 is a wasteful number, since it uses less digits than its factorization.

164565009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612156 (or 2612153 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 164565009 is about 12828.2894027224. The cubic root of 164565009 is about 547.9982428860.

The spelling of 164565009 in words is "one hundred sixty-four million, five hundred sixty-five thousand, nine".