Powers and Stats
Origin: The Elder Scrolls
Gender: Genderless, manifests as Female
Powers & Abilities: Immortality (Types 4, 9 and likely 5, due to existing outside Arkay's cycle of life and death and this text), Regeneration (Low-Godly), Reality Warping, Dream Manipulation, Fear Manipulation (Has complete control over her realm Quagmire, which is the source of all fear, terror, dreams, and nightmares, it was also stated in Skyrim that she was controlling the people of Dawnstar's nightmares), Telepathy, Telekinesis, Time Manipulation, Abstract Existence, Conceptual Manipulation, Acausality (According to Fa-Nuit-Hen, Daedra are not bound by time, cause and consequence in their natural state), Resurrection (Scaled from Molag Bal who has shown the ability to revive the dead, with their faculties intact, both in Oblivion and Skyrim)
Lifting Strength: Immeasurable
Striking Strength: Unknown
Standard Equipment: Vaermina's Orb, Skull of Corruption
Weaknesses: Cannot manifest her full power on Mundus
All Daedric Princes are comparable to Akatosh, whose power possibly extends into most of Oblivion, which contains infinite realms.
The Princes are believed to rank somewhere within Tier 2. However, the inconsistent nature of the lore makes it difficult to be any more specific.