Question: who wrote the most number 1 hits?
Answer: The most successful songwriters in terms of number one singles are John Lennon (1940-80) and Paul McCartney (b. 18 Jun 1942). McCartney is credited as the writer on 32 number one hits in the US to Lennons 26 (with 23 co-written), whereas Lennon authored 29 UK number ones to McCartney's 28 (25 co-written).