165206545 has 8 divisors (see below), whose sum is σ = 226569024. Its totient is φ = 113284464.

The previous prime is 165206537. The next prime is 165206557. The reversal of 165206545 is 545602561.

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 165206545 - 2³ = 165206537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165206545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2360059 + ... + 2360128.

It is an arithmetic number, because the mean of its divisors is an integer number (28321128).

Almost surely, 2^165206545 is an apocalyptic number.

It is an amenable number.

165206545 is a deficient number, since it is larger than the sum of its proper divisors (61362479).

165206545 is an equidigital number, since it uses as much as digits as its factorization.

165206545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4720199.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 165206545 is about 12853.2698174433. The cubic root of 165206545 is about 548.7094202934.

The spelling of 165206545 in words is "one hundred sixty-five million, two hundred six thousand, five hundred forty-five".