What is narrated about praying, fasting and worshipping on the 15th of Sha’ban is fabricated. So it is not permissible to follow such hadiths or to act upon them, whether that is in doing righteous deeds or otherwise. For more, please see the detailed answer.

There is no reliable hadith about the number of Prophets and Messengers in Islam; no one knows their number except Allah. For more, see the detailed answer.