164206165 has 4 divisors (see below), whose sum is σ = 197047404. Its totient is φ = 131364928.

The previous prime is 164206153. The next prime is 164206171. The reversal of 164206165 is 561602461.

164206165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60186564 + 104019601 = 7758^2 + 10199^2 .

It is a cyclic number.

It is not a de Polignac number, because 164206165 - 2⁹ = 164205653 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16420612 + ... + 16420621.

It is an arithmetic number, because the mean of its divisors is an integer number (49261851).

Almost surely, 2^164206165 is an apocalyptic number.

It is an amenable number.

164206165 is a deficient number, since it is larger than the sum of its proper divisors (32841239).

164206165 is an equidigital number, since it uses as much as digits as its factorization.

164206165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32841238.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 164206165 is about 12814.2953376298. The cubic root of 164206165 is about 547.5996385313.

The spelling of 164206165 in words is "one hundred sixty-four million, two hundred six thousand, one hundred sixty-five".