216608013518173 has 2 divisors, whose sum is σ = 216608013518174. Its totient is φ = 216608013518172.

The previous prime is 216608013518131. The next prime is 216608013518177. The reversal of 216608013518173 is 371815310806612.

216608013518173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210712572147364 + 5895441370809 = 14515942^2 + 2428053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216608013518173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216608013518173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216608013518177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108304006759086 + 108304006759087.

It is an arithmetic number, because the mean of its divisors is an integer number (108304006759087).

Almost surely, 2^{216608013518173} is an apocalyptic number.

It is an amenable number.

216608013518173 is a deficient number, since it is larger than the sum of its proper divisors (1).

216608013518173 is an equidigital number, since it uses as much as digits as its factorization.

216608013518173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 216608013518173 in words is "two hundred sixteen trillion, six hundred eight billion, thirteen million, five hundred eighteen thousand, one hundred seventy-three".