216016886161 has 4 divisors (see below), whose sum is σ = 216084585024. Its totient is φ = 215949187300.

The previous prime is 216016886093. The next prime is 216016886207. The reversal of 216016886161 is 161688610612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216016886161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216016881161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33844645 + ... + 33851026.

It is an arithmetic number, because the mean of its divisors is an integer number (54021146256).

Almost surely, 2^216016886161 is an apocalyptic number.

It is an amenable number.

216016886161 is a deficient number, since it is larger than the sum of its proper divisors (67698863).

216016886161 is an equidigital number, since it uses as much as digits as its factorization.

216016886161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67698862.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 216016886161 in words is "two hundred sixteen billion, sixteen million, eight hundred eighty-six thousand, one hundred sixty-one".