165193844 has 6 divisors (see below), whose sum is σ = 289089234. Its totient is φ = 82596920.

The previous prime is 165193807. The next prime is 165193859. The reversal of 165193844 is 448391561.

It can be written as a sum of positive squares in only one way, i.e., 95804944 + 69388900 = 9788^2 + 8330^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 20649227 + ... + 20649234.

It is an arithmetic number, because the mean of its divisors is an integer number (48181539).

Almost surely, 2^165193844 is an apocalyptic number.

It is an amenable number.

165193844 is a deficient number, since it is larger than the sum of its proper divisors (123895390).

165193844 is a wasteful number, since it uses less digits than its factorization.

165193844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41298465 (or 41298463 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 165193844 is about 12852.7757313352. The cubic root of 165193844 is about 548.6953584272.

The spelling of 165193844 in words is "one hundred sixty-five million, one hundred ninety-three thousand, eight hundred forty-four".