164604649 has 12 divisors (see below), whose sum is σ = 182734020. Its totient is φ = 148148000.

The previous prime is 164604613. The next prime is 164604653. The reversal of 164604649 is 946406461.

It can be written as a sum of positive squares in 2 ways, for example, as 136726249 + 27878400 = 11693^2 + 5280^2 .

It is not a de Polignac number, because 164604649 - 2¹⁷ = 164473577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164604689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5487 + ... + 18955.

It is an arithmetic number, because the mean of its divisors is an integer number (15227835).

Almost surely, 2^164604649 is an apocalyptic number.

It is an amenable number.

164604649 is a deficient number, since it is larger than the sum of its proper divisors (18129371).

164604649 is a wasteful number, since it uses less digits than its factorization.

164604649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13592 (or 13581 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 164604649 is about 12829.8343325235. The cubic root of 164604649 is about 548.0422394937.

The spelling of 164604649 in words is "one hundred sixty-four million, six hundred four thousand, six hundred forty-nine".