Bill Gates tops world's richest men again with fortune of $86bn, while Donald Trump slips to 544 from 220

Microsoft co-founder, Bill Gates has again rule Forbes magazine list of the world's richest billionaires, for the fourth straight time, with a wealth of $86 billion.

Bill Gates

Second on the list is the Berkshire Hathaway chief, Warren Buffett, with an estimated fortune of $75.6billion, followed by Jeff Bezos, the founder of Amazon, with an estimated net worth of $72.8billion.

Fourth on the list is Amancio Ortega, the founder of Inditex fashion group, net worth of $71.3billion, while the fifth is the Facebook founder, Mark Zuckerberg, who is said to worth $56billion.

Former world's richest man, Carlos Slim has been dropped to six with $54.5billion, while Oracle co-founder Larry Ellison follows him in the seventh position with $52.2billion worth.

The Republican mega-donors Charles and David Koch are in eighth and ninth, respectively, both worth $48.3billion, while Michael Bloomberg, the co-founder of Bloomberg, rounded the top 10 with $47.5billion worth.

In another twist, the current United States of America, Donald Trump, dropped down the list to number 544 with an estimated net worth of $3.5billion, cutting off $1billion from his valuation in the same list in 2016.

Find the Top 20 richest men on earth below:

1. Bill Gates, Microsoft co-founder: $86billion
2. Warren Buffett, Berkshire Hathaway CEO: $75.6billion
3. Jeff Bezos, Amazon CEO: $72.8billion
4. Amancio Ortega, Inditex fashion group founder: $71.3billion 
5. Mark Zuckerberg, Facebook CEO: $56billion
6. Carlos Slim, Mexican telecom mogul: $54.5billion
7. Larry Ellison, Oracle co-founder: $52.2billion
8. Charles Koch, Koch Industries CEO and chairman: $48.3billion
9. David Koch, Koch Industries CEO and chairman: $48.3billion
10. Michael Bloomberg, Bloomberg co-founder: $47.5billion
11. Bernard Arnault, LVMH CEO: $41.5billion
12. Larry Page, Google co-founder and Alphabet CEO: $40.7billion
13. Sergey Brin, Google co-founder and Alphabet president: $39.8billion
14. Liliane Bettencourt, L'Oréal heiress: $39.5billion
15. S. Robson Walton, Wal-Mart heir: $34.1billion
16. Jim Walton, Wal-Mart heir: $34billion
17. Alice Walton, Wal-Mart heiress: $33.8billion
18. Wang Jianlin, Dalian Wanda Commercial Property chairman: $31.3billion
19. Li Ka-shing, Cheung Kong Holdings CEO: $31.2billion
20. Sheldon Adelson,Las Vegas Sands Corporation CEO: $30.4billion