165104505 has 12 divisors (see below), whose sum is σ = 286181220. Its totient is φ = 88055712.

The previous prime is 165104501. The next prime is 165104507. The reversal of 165104505 is 505401561.

It is a happy number.

165104505 is a `hidden beast` number, since 1 + 651 + 0 + 4 + 5 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 129140496 + 35964009 = 11364^2 + 5997^2 .

It is not a de Polignac number, because 165104505 - 2² = 165104501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165104501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1834450 + ... + 1834539.

It is an arithmetic number, because the mean of its divisors is an integer number (23848435).

Almost surely, 2^165104505 is an apocalyptic number.

165104505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165104505 is a deficient number, since it is larger than the sum of its proper divisors (121076715).

165104505 is a wasteful number, since it uses less digits than its factorization.

165104505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669000 (or 3668997 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 165104505 is about 12849.2997863697. The cubic root of 165104505 is about 548.5964267056.

The spelling of 165104505 in words is "one hundred sixty-five million, one hundred four thousand, five hundred five".