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> the entire heat of the inner planet

... is an energy figure, not a power figure, unless you mean either the rate at which heat is added through thermal decay, or the rate at which heat is lost through conduction to the surface, both of which are at the same mid-ten-terrawatts order of magnitude as human power usage.

Power is not the same as energy obviously, but otherwise it is the rate at which the thermal energy is spent.

~180,000TWh of annual human energy production vs ~ 3,000,000,000,000,000TWh of thermal energy inside Earth.