164685085 has 4 divisors (see below), whose sum is σ = 197622108. Its totient is φ = 131748064.

The previous prime is 164685061. The next prime is 164685089. The reversal of 164685085 is 580586461.

164685085 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 70459236 + 94225849 = 8394^2 + 9707^2 .

It is a cyclic number.

It is not a de Polignac number, because 164685085 - 2⁹ = 164684573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164685089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16468504 + ... + 16468513.

It is an arithmetic number, because the mean of its divisors is an integer number (49405527).

Almost surely, 2^164685085 is an apocalyptic number.

It is an amenable number.

164685085 is a deficient number, since it is larger than the sum of its proper divisors (32937023).

164685085 is an equidigital number, since it uses as much as digits as its factorization.

164685085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32937022.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 164685085 is about 12832.9686744728. The cubic root of 164685085 is about 548.1314940547.

The spelling of 164685085 in words is "one hundred sixty-four million, six hundred eighty-five thousand, eighty-five".