1. Suadi Arabia holds the world's second-largest oil reserves and therefore produces a large amount of the world's fuel, keeping prices low and affordable for millions of people worldwide.
2. Saudi Arabia had the third-largest defense budget in the world in 2017, according to the Stockholm International Peace Research Institute (Sipri).
That year the country signed a $110bn (£84bn) arms deal with the US, with options running as high as $350bn over 10 years. The deal was described by the White House as the single biggest in US history