As an expert in the field of finance and economics, I have been closely monitoring the wealth of the world's richest individuals for many years. The question of who is the richest man in the world is a dynamic one, as the rankings can change frequently due to fluctuations in the stock market, economic conditions, and various other factors that affect the net worth of these ultra-high-net-worth individuals.

The figures you've provided are from January 16, and they give us a snapshot of the wealth of some of the world's richest men at that time. However, it's important to note that these figures are constantly evolving. For instance, Jeff Bezos, the founder of Amazon, is listed with a net worth of $108.9 billion, which would make him the richest man in the world according to the data from that date.

But to provide a comprehensive answer, we must consider several other factors. Wealth rankings are often based on the value of an individual's assets, which can include stocks, real estate, cash, and other investments. The value of these assets can fluctuate daily, and thus the rankings can change rapidly.

Moreover, the methodology used by different sources to calculate net worth can vary. Some may include the estimated value of private companies, while others may not. Additionally, the timing of the valuation is crucial, as stock prices can change significantly within a short period.

It's also worth noting that there are other wealthy individuals not listed in your data, such as Elon Musk, the CEO of Tesla and SpaceX, whose wealth can also be substantial and competitive with the individuals mentioned.

To determine the richest man in the world at any given time, one would typically refer to real-time data from reliable financial news sources or wealth tracking databases. These sources take into account the most recent financial information and adjust the rankings accordingly.

In conclusion, while the figures you've provided give us a glimpse into the wealth of some of the world's richest men as of January 16, the actual richest man in the world can change from day to day. For the most current information, it's best to consult up-to-date financial data.

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Click through to see 2018's top 20 richest billionaires on the planet.9 (tie). ... Carlos Slim Helu & family (Mexico) ... Amancio Ortega (Spain) ... Mark Zuckerberg (U.S.) ... Bernard Arnault (France) ... Warren Buffett (U.S.) CEO, Berkshire Hathaway. ... Bill Gates (U.S.) Co-founder, Microsoft. ... Jeff Bezos (U.S.) CEO, Amazon.More items...read more >>