163800165 has 16 divisors (see below), whose sum is σ = 263210688. Its totient is φ = 86983296.

The previous prime is 163800163. The next prime is 163800191. The reversal of 163800165 is 561008361.

It is not a de Polignac number, because 163800165 - 2¹ = 163800163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163800163) 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 15 ways as a sum of consecutive naturals, for example, 19939 + ... + 26928.

It is an arithmetic number, because the mean of its divisors is an integer number (16450668).

Almost surely, 2^163800165 is an apocalyptic number.

163800165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163800165 is a deficient number, since it is larger than the sum of its proper divisors (99410523).

163800165 is a wasteful number, since it uses less digits than its factorization.

163800165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47108.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 163800165 is about 12798.4438507187. The cubic root of 163800165 is about 547.1479524072.

The spelling of 163800165 in words is "one hundred sixty-three million, eight hundred thousand, one hundred sixty-five".