Though it was already covered, Akka, in year 4111 year-of-the-Tusk, had spent 39 years with the Mandate. (page 318 USA small edition paperback). The Glossary says that he is 47 years old, which is probably his age at the start of the TDTCB, which is year 4110. This makes Akka 48 years old in year 4111 year-of-the-tusk
Also noted that Akka is ever the devout friend. He was willing to risk inciting a riot, not to mention the attention of the SS and the College of Luthymae, to capture a man he suspected of being involved with Inrau and Esmenet. A good man to have at your side.