Jayapataka Swami: There is Parasar muni the father of Vyasadeva, he studied all the different personalities and He came up with a study that Lord Brahma had 50 qualities in some supply (?) The living entities can have up to 50 but generally much smaller than Lord Brahma. Lord Siva has five more qualities, so He has 55. And more than that is Visnu, all the different Visnu avataras, the different Mahavisnu, Garbodakasayi Visnu, Karanodakasayi Visnu, Narayana, etc. have 60 qualities. Only Krsna has 64 so He is considered as the original Personality of Godhead. So this was the study of the different standards of atma.