216676161 has 16 divisors (see below), whose sum is σ = 345694720. Its totient is φ = 133338960.

The previous prime is 216676151. The next prime is 216676189. The reversal of 216676161 is 161676612.

216676161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216676161 - 2¹⁸ = 216414017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216676151) 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, 308305 + ... + 309006.

It is an arithmetic number, because the mean of its divisors is an integer number (21605920).

Almost surely, 2^216676161 is an apocalyptic number.

It is an amenable number.

216676161 is a deficient number, since it is larger than the sum of its proper divisors (129018559).

216676161 is a wasteful number, since it uses less digits than its factorization.

216676161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617333 (or 617327 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 216676161 is about 14719.9239468144. The cubic root of 216676161 is about 600.6254228506.

The spelling of 216676161 in words is "two hundred sixteen million, six hundred seventy-six thousand, one hundred sixty-one".