165274465 has 4 divisors (see below), whose sum is σ = 198329364. Its totient is φ = 132219568.

The previous prime is 165274453. The next prime is 165274489. The reversal of 165274465 is 564472561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564472561 = 5521 ⋅102241.

It can be written as a sum of positive squares in 2 ways, for example, as 82519056 + 82755409 = 9084^2 + 9097^2 .

It is a cyclic number.

It is not a de Polignac number, because 165274465 - 2⁷ = 165274337 is a prime.

It is a Smith number, since the sum of its digits (40) 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16527442 + ... + 16527451.

It is an arithmetic number, because the mean of its divisors is an integer number (49582341).

Almost surely, 2^165274465 is an apocalyptic number.

It is an amenable number.

165274465 is a deficient number, since it is larger than the sum of its proper divisors (33054899).

165274465 is an equidigital number, since it uses as much as digits as its factorization.

165274465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33054898.

The product of its digits is 201600, while the sum is 40.

The square root of 165274465 is about 12855.9116751789. The cubic root of 165274465 is about 548.7846054456.

The spelling of 165274465 in words is "one hundred sixty-five million, two hundred seventy-four thousand, four hundred sixty-five".