164865449 has 24 divisors (see below), whose sum is σ = 201282048. Its totient is φ = 134386560.

The previous prime is 164865433. The next prime is 164865499. The reversal of 164865449 is 944568461.

It is a happy number.

It is not a de Polignac number, because 164865449 - 2⁴ = 164865433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164865499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271304 + ... + 271910.

It is an arithmetic number, because the mean of its divisors is an integer number (8386752).

Almost surely, 2^164865449 is an apocalyptic number.

It is an amenable number.

164865449 is a deficient number, since it is larger than the sum of its proper divisors (36416599).

164865449 is a wasteful number, since it uses less digits than its factorization.

164865449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 878 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 164865449 is about 12839.9941199363. The cubic root of 164865449 is about 548.3315265772.

The spelling of 164865449 in words is "one hundred sixty-four million, eight hundred sixty-five thousand, four hundred forty-nine".