161116216 has 8 divisors (see below), whose sum is σ = 302092920. Its totient is φ = 80558104.

The previous prime is 161116211. The next prime is 161116217. The reversal of 161116216 is 612611161.

161116216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161116211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10069756 + ... + 10069771.

It is an arithmetic number, because the mean of its divisors is an integer number (37761615).

Almost surely, 2^161116216 is an apocalyptic number.

It is an amenable number.

161116216 is a deficient number, since it is larger than the sum of its proper divisors (140976704).

161116216 is a wasteful number, since it uses less digits than its factorization.

161116216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20139533 (or 20139529 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 161116216 is about 12693.1562662720. The cubic root of 161116216 is about 544.1430473731.

Adding to 161116216 its reverse (612611161), we get a palindrome (773727377).

The spelling of 161116216 in words is "one hundred sixty-one million, one hundred sixteen thousand, two hundred sixteen".