Bill Gates is richest man in the world. The ranks of the world's billionaires continue to scale new heights, according to the US Forbes magazine. The magazine found 1,645 billionaires, a 15.3% increase on last year's figures and a record since the Richest People On The Planet survey began in 1987. Together, they account for an aggregate net worth of $6.4 trillion, up from $5.4 trillion a year ago. The US once again leads the world with 492 billionaires on its territory, followed by China with 152 and Russia with 111. Bill Gates, the founder of Microsoft is back in first place in the 2014 survey, with an estimated fortune of $76 billion ($9 billion more than last year), followed by Carlos Slim from Mexico ($72 billion), who was in first place for the past four years. In third place is Amancio Ortega from Spain, founder of the Zara retail clothing label, with an estimated fortune of $64 billion. According to Forbes, the hi-tech and new technologies boom continues to influence this list - out of the 25 new billionaires that appear on this list, four of them make their money in the new technologies sector. Facebook founder, Mark Zuckerberg, saw his fortune increase the most last year, with an additional $15 billion made over the past 12 months. His fortune is now worth $28.5 billion, which puts him in 21st place. (IL)