There is, it's -272.05°C. Melting point is the same as freezing point, you might have searched for the wrong one, but you would call it freezing in helium because it is gas at room temperature.
-272.2 degrees celsius (-457.96 degrees fahrenheit)
1480 c
Yes
At standard pressure Helium does not solidify so there is no "melting point". Define a pressure and there might be an answer.
It is <-272.2squareC that was the melting point, the boiling point is-268.93squareC