Immortals have the same life span as Dao Lords. However Celestial Immortals
usually don’t live that long because heart demons cause them to lose control
over their immortal energy and explode. However there are pills that can help
them controlling their energy. So if a Celestial Immortal takes those pills he
can live up to 108 000 Chaos Cycles.
answer your question. A World God can live up to 108 000 Chaos Cycles