Unable to answer "What’s the house number of this building?" – Apartment Building – https://osm.org/way/427890656 via StreetComplete 58.0:

Not an apartment building, but a single storey (retail?) building, currently vacant. No signed house number. Needs geometry tweaking so front is more square - flush with boundary wall of building to south.
disused:shop=yes
old_name=Herdwick Distillery