Asia has more billionaires than any other continent, a survey by a China-based wealth magazine showed on Thursday, apparently overtaking North America for the first time.

There were 1,453 people around the world with a personal wealth of $1 billion or more as of January, said the Hurun Report, a luxury magazine publisher that compiled the list. Asia had 608 billionaires, North America 440 and Europe 324, it said in a statement.

It is believed to be the first time Asia has been named as home of the largest proportion of super-rich on any global list.

U.S. business magazine Forbes said in its most recent international rich list, published in March last year, that the Asia-Pacific region had 315 billionaires, compared to 450 from North America and 310 in Europe. Among individual countries, the U.S and China dominated the Hurun list, with 408 and 317 billionaires respectively, followed by Russia, Germany and India. Mexican telecoms czar Carlos Slim, 73, was ranked as the "Richest Man on the Planet" with a personal fortune of $66 billion. Slim also topped last year's Forbes global list.

US investor Warren Buffett and Amancio Ortega of Spain, founder of fashion brand Zara, were second and third in the Hurun Report rankings, with a net worth of $58 billion and $55 billion respectively.