164775965 has 8 divisors (see below), whose sum is σ = 200440248. Its totient is φ = 130014720.

The previous prime is 164775959. The next prime is 164775991. The reversal of 164775965 is 569577461.

It can be written as a sum of positive squares in 4 ways, for example, as 53304601 + 111471364 = 7301^2 + 10558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164775965 - 2¹⁸ = 164513821 is a prime.

It is a super-2 number, since 2×164775965² = 54302237283362450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225356 + ... + 226085.

It is an arithmetic number, because the mean of its divisors is an integer number (25055031).

Almost surely, 2^164775965 is an apocalyptic number.

It is an amenable number.

164775965 is a deficient number, since it is larger than the sum of its proper divisors (35664283).

164775965 is an equidigital number, since it uses as much as digits as its factorization.

164775965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451519.

The product of its digits is 1587600, while the sum is 50.

The square root of 164775965 is about 12836.5090659416. The cubic root of 164775965 is about 548.2323026775.

The spelling of 164775965 in words is "one hundred sixty-four million, seven hundred seventy-five thousand, nine hundred sixty-five".