Bill Gates Richest Man In World, Mukesh Ambani At 36th: Forbes

Other prominent Indian billionaires include ArcelorMittal Chairman Lakshmi Mittal (135), Bharti Airtel's Sunil Mittal (219), Ports and power magnate Gautam Adani (453), matriarch Savitri Jindal (453), Bajaj Group's Rahul Bajaj (722), Infosys chairman emeritus N R Narayana Murthy (959) and Mahindra Group's Chief Anand Mahindra (1577).
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Also making to the list is investor Rakesh Jhunjhunwala on the 1011 rank, Infosys cofounder Nandan Nilekani (1121), Former Amazon executive and Flipkart founder Sachin Bansal (1476) and pharma company Wockhardt chairman Habil Khorakiwala (1694).

Forbes' 221 people fell off the list, while 198 newcomers joined the ranks of billionaires in 2016.

Apart from Gates, Buffett held steady in the top 20.

Facebook founder Mark Zuckerberg had the best year of all billionaires. The 31-year-old added $11.2 billion to his fortune and moved up to No. 6 from 16. He and Amazon's Jeff Bezos both make their first appearance in the top ten of Forbes' annual ranking of the world's wealthiest.

In another first, billionaire from China's mainland, Wang Jianlin, whose company owns AMC Theaters climbed into the top 20.

Among the most notable newcomers are Cameron Mackintosh, the first theater producer to make the billionaireranks; WeWork's Adam Neumann and Miguel McKelvey and Pinterest's Ben Silbermann and Evan Sharp.

Neumann, Silbermann and Sharp are three of a record 66 billionaires under the age of 40.

The youngest billionaire in the world is a 19-year-old Norwegain heiress, Alexandra Andresen, who has a 42 per cent stake in her family's business.

Her sister Katharina is second youngest, just 20.

Forbes said another new entrant worth mentioning is Zhou Qunfei, whose $5.9 billion fortune from smartphone screensis enough to make her the richest self-made woman in the world.

She is one of 190 women in the list, down from 197 last year.

The US has 540 billionaires, more than any other country in the world, followed by mainland China with 251 (Hong Kong has another 69) and Germany with 120.

Russia has 77, ten-figure fortunes, 11 fewer than last year, while Brazil is down 23 to 31

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