163909816 has 16 divisors (see below), whose sum is σ = 351235440. Its totient is φ = 70247040.

The previous prime is 163909813. The next prime is 163909831. The reversal of 163909816 is 618909361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163909813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463425 + ... + 1463536.

It is an arithmetic number, because the mean of its divisors is an integer number (21952215).

Almost surely, 2^163909816 is an apocalyptic number.

It is an amenable number.

163909816 is an abundant number, since it is smaller than the sum of its proper divisors (187325624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163909816 is a wasteful number, since it uses less digits than its factorization.

163909816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926974 (or 2926970 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 163909816 is about 12802.7268970325. The cubic root of 163909816 is about 547.2700156496.

The spelling of 163909816 in words is "one hundred sixty-three million, nine hundred nine thousand, eight hundred sixteen".