There are 64 ayaat in Surah an-Nur and it was revealed in Madinah.
In the commentary of Burhan it is narrated from Imam Ja’far as-Sadiq (a.s.) that whoever constantly recites surah an-Nur will never, in his lifetime, see any evil from his near ones and when he dies, seventy thousand angels will accompany his body up to the grave and will pray for his forgiveness.
The Holy Prophet (s.a.w.) said that it is especially good for women to recite this surah. He (s.a.w.) also said that the reward for reciting this surah is equal to ten times the number of mu’mineen and mu’minaat on the Earth.