168445816 has 64 divisors (see below), whose sum is σ = 406517760. Its totient is φ = 63504000.

The previous prime is 168445789. The next prime is 168445817. The reversal of 168445816 is 618544861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168445817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14686 + ... + 23506.

It is an arithmetic number, because the mean of its divisors is an integer number (6351840).

Almost surely, 2^168445816 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 168445816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203258880).

168445816 is an abundant number, since it is smaller than the sum of its proper divisors (238071944).

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

168445816 is a wasteful number, since it uses less digits than its factorization.

168445816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876 (or 8872 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 168445816 is about 12978.6677282377. The cubic root of 168445816 is about 552.2724885154.

The spelling of 168445816 in words is "one hundred sixty-eight million, four hundred forty-five thousand, eight hundred sixteen".