163888361 has 16 divisors (see below), whose sum is σ = 202355328. Its totient is φ = 129254400.

The previous prime is 163888343. The next prime is 163888393.

163888361 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 163888361 - 2¹⁰ = 163887337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163888321) 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, 27401 + ... + 32841.

It is an arithmetic number, because the mean of its divisors is an integer number (12647208).

Almost surely, 2^163888361 is an apocalyptic number.

It is an amenable number.

163888361 is a deficient number, since it is larger than the sum of its proper divisors (38466967).

163888361 is a wasteful number, since it uses less digits than its factorization.

163888361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792.

The product of its digits is 165888, while the sum is 44.

The square root of 163888361 is about 12801.8889621805. Note that the first 3 decimals coincide. The cubic root of 163888361 is about 547.2461362774.

The spelling of 163888361 in words is "one hundred sixty-three million, eight hundred eighty-eight thousand, three hundred sixty-one".