Unable to answer "What’s the house number of this building?" – Normandie Gardens Apartments (Apartment Building) – https://osm.org/way/427274621 via StreetComplete 56.1:

The building is three separate apartment buildings merged together.

Attached photo(s):
https://westnordost.de/p/199871.jpg
https://westnordost.de/p/199872.jpg
https://westnordost.de/p/199873.jpg
https://westnordost.de/p/199874.jpg
https://westnordost.de/p/199875.jpg