165050643 has 4 divisors (see below), whose sum is σ = 220067528. Its totient is φ = 110033760.

The previous prime is 165050623. The next prime is 165050657. The reversal of 165050643 is 346050561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346050561 = 3 ⋅115350187.

It is not a de Polignac number, because 165050643 - 2⁸ = 165050387 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 165050643.

It is not an unprimeable number, because it can be changed into a prime (165050623) 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, 27508438 + ... + 27508443.

It is an arithmetic number, because the mean of its divisors is an integer number (55016882).

Almost surely, 2^165050643 is an apocalyptic number.

165050643 is a deficient number, since it is larger than the sum of its proper divisors (55016885).

165050643 is an equidigital number, since it uses as much as digits as its factorization.

165050643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55016884.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 165050643 is about 12847.2037035302. The cubic root of 165050643 is about 548.5367640604.

The spelling of 165050643 in words is "one hundred sixty-five million, fifty thousand, six hundred forty-three".