165055641 has 16 divisors (see below), whose sum is σ = 231939840. Its totient is φ = 104118480.

The previous prime is 165055633. The next prime is 165055651. The reversal of 165055641 is 146550561.

165055641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165055641 - 2³ = 165055633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165055651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72466 + ... + 74708.

It is an arithmetic number, because the mean of its divisors is an integer number (14496240).

Almost surely, 2^165055641 is an apocalyptic number.

It is an amenable number.

165055641 is a deficient number, since it is larger than the sum of its proper divisors (66884199).

165055641 is a wasteful number, since it uses less digits than its factorization.

165055641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 165055641 is about 12847.3982190948. The cubic root of 165055641 is about 548.5423008642.

It can be divided in two parts, 1650 and 55641, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 165055641 in words is "one hundred sixty-five million, fifty-five thousand, six hundred forty-one".