How many kids did Prophet Muhammad had?

Prophet Muhammad (pbuh) had 6 children from Hazrat Khadija (ra). Four of them were daughters and two were sons. Their names are as follows:

Qasim bin Muhammad

Abullah bin Muhammad

Zaynab binte Muhammad

Ruqqayah binte Muhammad

Umm Kulthum binte Muhammad

Fatimah binte Muhammad

He also had another son from Hazrat Maria Qibtia (ra): Ibrahim bin Muhammad