163843816 has 16 divisors (see below), whose sum is σ = 310250340. Its totient is φ = 81110400.

The previous prime is 163843793. The next prime is 163843817. The reversal of 163843816 is 618348361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152621316 + 11222500 = 12354^2 + 3350^2 .

It is not an unprimeable number, because it can be changed into a prime (163843817) 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, 100581 + ... + 102196.

Almost surely, 2^163843816 is an apocalyptic number.

It is an amenable number.

163843816 is a deficient number, since it is larger than the sum of its proper divisors (146406524).

163843816 is a wasteful number, since it uses less digits than its factorization.

163843816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202884 (or 202880 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 163843816 is about 12800.1490616321. The cubic root of 163843816 is about 547.1965511251.

It can be divided in two parts, 1638 and 43816, that added together give a palindrome (45454).

The spelling of 163843816 in words is "one hundred sixty-three million, eight hundred forty-three thousand, eight hundred sixteen".