Unable to answer "What’s the house number of this building?" for https://osm.org/way/169503761 via StreetComplete 48.0:

This building is actually part of the hotel next door.  It doesn't have its own dedicated entrance, and people probably just go in through the restaurant or by crossing over from the other hotel building.  So, I don't think it has it's own address, and its outline should probably just be merged with that of the hotel.