Classification of Semisimple Hopf Algebras of Dimension 16

In this paper we completely classify nontrivial semisimple Hopf algebras of dimension 16. We also compute all the possible structures of the Grothendieck ring of semisimple non-commutative Hopf algebras of dimension 16. Moreover, we prove that non-commutative semisimple Hopf algebras of dimension pn, p-prime, cannot have a cyclic group of grouplikes.