How many nucleotides are present in DNA?

Oh, dude, DNA is like the building block of life, right? So, it's got these little guys called nucleotides hanging out in there. And, like, there are four different types of nucleotides in DNA: adenine, thymine, cytosine, and guanine. So, if you're counting them all up, you've got a total of about 3 billion nucleotides in the human genome. Crazy, right?