163773816 has 64 divisors (see below), whose sum is σ = 419904000. Its totient is φ = 53209728.

The previous prime is 163773781. The next prime is 163773833. The reversal of 163773816 is 618377361.

163773816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252805 + ... + 253451.

It is an arithmetic number, because the mean of its divisors is an integer number (6561000).

Almost surely, 2^163773816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163773816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209952000).

163773816 is an abundant number, since it is smaller than the sum of its proper divisors (256130184).

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

163773816 is a wasteful number, since it uses less digits than its factorization.

163773816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 904 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 163773816 is about 12797.4144263597. The cubic root of 163773816 is about 547.1186126433.

The spelling of 163773816 in words is "one hundred sixty-three million, seven hundred seventy-three thousand, eight hundred sixteen".