Like all Nordic gods Loki has a huge lifespan and could live for at least 3,000 years. He prolongs his life, however, just like the other gods by regularly eating apples of Idun to stay forever young.
Loki is a master shape-shifter and uses this power to confuse, trick and anger humans and gods alike. Due to his heritage Lokis strength and stamina is superior to most other gods.
as norse a god, it is not unreasonable to assume he could pretty much do almost anything he desired - though he would not have anything like the power of a god such as Odin
His mastery of magic is unmatched except against Odin and Freya.