"4500" in English is "four thousand five hundred." This number comes from the English language's system of counting, which is based on the Hindu-Arabic numeral system. Here are some examples of how to use this number in sentences:

"I have 4500 dollars in my savings account." (我储蓄账户里有4500美元。)

"The car can go 4500 miles on a single tank of gas." (这辆车一次加油可以行驶4500英里。)

"The store is offering a 4500 dollar discount on all appliances." (商店正在提供所有家电4500美元的折扣。)

It's important to note that in English, numbers are typically written as words when they are less than ten, and as numerals (digits) when they are greater than ten. So, "four thousand five hundred" would be written as "4,500" using numerals.