Microsoft's co-founder Bill Gates continued his reign as the world's richest person with a net worth of USD 75 billion, according to Forbes' annual ranking of billionaires, with Reliance Industries Chairman Mukesh Ambani leading the pack of 84 Indian billionaires in 2016.

Forbes' 2016 list of the World's Billionaires includes 1,810 billionaires, down from a record 1,826 a year ago. Their aggregate net worth is USD 6.5 billion, USD 570 million less than last year. Gates remains the richest person in the world with a net worth of USD 75 billion, despite being USD 4.2 billion poorer than a year ago. He has been number one for 3 years in a row and topped the list 17 out of 22 years.

Here are the top five richest persons of the planet:

#1.  Bill Gates

Age: 60Net worth: $ 75 BillionSource: Microsoft

#2.  Amancio Ortega

Age: 79Net worth: $ 67 BillionSource: ZaraCountry: Spain

#3.  Warren Buffett

Age: 85

#4.  Carlos Slim Helu

Age: 76

#5.  Jeff Bezos

Age: 52United States of America

And here are some Indians who made it to the list:

#36.  Mukesh Ambani

Age: 58

#44.  Dillip Shangvi

Net worth: $ 16.7 Billion

#55.  Azim Premji

Age: 70