163809844 has 12 divisors (see below), whose sum is σ = 312727968. Its totient is φ = 74459000.

The previous prime is 163809809. The next prime is 163809847. The reversal of 163809844 is 448908361.

163809844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 163809844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163809847) 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, 1861432 + ... + 1861519.

It is an arithmetic number, because the mean of its divisors is an integer number (26060664).

Almost surely, 2^163809844 is an apocalyptic number.

It is an amenable number.

163809844 is a deficient number, since it is larger than the sum of its proper divisors (148918124).

163809844 is a wasteful number, since it uses less digits than its factorization.

163809844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722966 (or 3722964 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 163809844 is about 12798.8219770415. The cubic root of 163809844 is about 547.1587292395.

The spelling of 163809844 in words is "one hundred sixty-three million, eight hundred nine thousand, eight hundred forty-four".