There are many buildings or housing complexes in the world with a massive population.
Russia's Novy Okkervil complex houses around 18,000 residents.
Hangzhou Regent International building's estimated population is between 15,000 to 20,000.
Johannesburg's Ponte City used to have 10,000 residents but is now home to 3000 people.
The Copan in Sao Paulo has around 6,000 residents.
Le Lignon Houses over 6,000 residents.
Prateek Grand City in India's Ghaziabad can house around 8000-10,000 people
Saya Gold in India's Indirapuram can house around 6,000-7000 people.