Ubara-tutu of Shuruppak was the last antediluvian king of Sumer, according to some versions of the Sumerian King List. He was said to have reigned for 18,600 years. He was the son of En-men-dur-ana, a Sumerian mythological figure often compared to Enoch, as he entered heaven without dying. Ubara-Tutu was the king of Sumer until a flood swept over his land.