165055011 has 24 divisors (see below), whose sum is σ = 243102720. Its totient is φ = 99535920.

The previous prime is 165055003. The next prime is 165055021. The reversal of 165055011 is 110550561.

It is not a de Polignac number, because 165055011 - 2³ = 165055003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165055001) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 79930 + ... + 81968.

It is an arithmetic number, because the mean of its divisors is an integer number (10129280).

Almost surely, 2^165055011 is an apocalyptic number.

165055011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165055011 is a deficient number, since it is larger than the sum of its proper divisors (78047709).

165055011 is a wasteful number, since it uses less digits than its factorization.

165055011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 165055011 is about 12847.3737004884. The cubic root of 165055011 is about 548.5416029539.

It can be divided in two parts, 1650550 and 11, that added together give a palindrome (1650561).

The spelling of 165055011 in words is "one hundred sixty-five million, fifty-five thousand, eleven".