Forbes: Buffet out of top 3 wealthiest, Mexico's Slim still leads

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With a net worth of $73 billion, Mexican telecom magnate Carlos Slim Helu is the world's richest person on Forbes' 27th annual ranking of the world's billionaires, topping the list for the fourth year in a row.

Bill Gates retains the #2 spot with a net worth of $67 billion. Zara's Amancio Ortega (#3) moves up two spots from 2012, with a net worth of $57 billion, ahead of Warren Buffett (#4) with a net worth of $53.5 billion. This marks the first year Buffett has not been in the top three since 2000.

A record 1,426 billionaires made the list, up 200 from 2012, with an average net worth of $3.8 billion. Added together, the total net worth for this year's billionaires is $5.4 trillion, up from $4.6 trillion last year. The Top 10 have a combined net worth of $451.5 billion, up from $395.4 billion in 2012. The U.S. leads the list, with 442 billionaires, followed by Asia-Pacific (386), Europe (366), the Americas (129) and the Middle East & Africa (103).

A total of 138 women made the list this year, up from 104 last year. With a net worth of $30 billion, Liliane Bettencourt (#9) is now the richest woman in the world. Other women on the list include Miuccia Prada (#78) of Italy and Anne Cox Chambers (#80) of the U.S.

New York Mayor Michael Bloomberg moves up to 13 from the No. 20 spot last year with a net worth of $27 billion. The year's biggest loser, with a $19.4 billion drop in his fortune, is Brazilian Eike Batista (#100). Mark Zuckerberg (#66) has a net worth of $13.3 billion, compared to $17.5 billion in 2012, when he ranked #35.

Sixty former billionaires dropped off the list this year, including Zynga's Mark Pincus and former Chesapeake Energy CEO Aubrey McClendon.