163575563 has 4 divisors (see below), whose sum is σ = 170687568. Its totient is φ = 156463560.

The previous prime is 163575539. The next prime is 163575571. The reversal of 163575563 is 365575361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365575361 = 17 ⋅21504433.

It is a cyclic number.

It is not a de Polignac number, because 163575563 - 2¹⁰ = 163574539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163575563.

It is not an unprimeable number, because it can be changed into a prime (163575163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555968 + ... + 3556013.

It is an arithmetic number, because the mean of its divisors is an integer number (42671892).

Almost surely, 2^163575563 is an apocalyptic number.

163575563 is a deficient number, since it is larger than the sum of its proper divisors (7112005).

163575563 is an equidigital number, since it uses as much as digits as its factorization.

163575563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112004.

The product of its digits is 283500, while the sum is 41.

The square root of 163575563 is about 12789.6662583509. Note that the first 3 decimals coincide. The cubic root of 163575563 is about 546.8977558009.

The spelling of 163575563 in words is "one hundred sixty-three million, five hundred seventy-five thousand, five hundred sixty-three".