163808564 has 12 divisors (see below), whose sum is σ = 287133924. Its totient is φ = 81770304.

The previous prime is 163808563. The next prime is 163808597. The reversal of 163808564 is 465808361.

It can be written as a sum of positive squares in 2 ways, for example, as 84456100 + 79352464 = 9190^2 + 8908^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163808563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30719 + ... + 35654.

It is an arithmetic number, because the mean of its divisors is an integer number (23927827).

Almost surely, 2^163808564 is an apocalyptic number.

It is an amenable number.

163808564 is a deficient number, since it is larger than the sum of its proper divisors (123325360).

163808564 is a wasteful number, since it uses less digits than its factorization.

163808564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66994 (or 66992 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 163808564 is about 12798.7719723417. The cubic root of 163808564 is about 547.1573040809.

The spelling of 163808564 in words is "one hundred sixty-three million, eight hundred eight thousand, five hundred sixty-four".