816443165 has 8 divisors (see below), whose sum is σ = 985206240. Its totient is φ = 649504912.

The previous prime is 816443153. The next prime is 816443179. The reversal of 816443165 is 561344618.

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 816443165 - 2⁴ = 816443149 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 455219 + ... + 457008.

It is an arithmetic number, because the mean of its divisors is an integer number (123150780).

Almost surely, 2^816443165 is an apocalyptic number.

It is an amenable number.

816443165 is a deficient number, since it is larger than the sum of its proper divisors (168763075).

816443165 is a wasteful number, since it uses less digits than its factorization.

816443165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912411.

The product of its digits is 69120, while the sum is 38.

The square root of 816443165 is about 28573.4696003128. The cubic root of 816443165 is about 934.6348827485.

The spelling of 816443165 in words is "eight hundred sixteen million, four hundred forty-three thousand, one hundred sixty-five".