No, don't try to pronounce it. I haven't a clue. The song is Prisencolinensinainciusol, composed by Italian musician/songwriter/actor Adriano Celentano and released in 1972. It's a nonsense song, meant to imitate the sounds of spoken English with an American accent, as a sort of joke and experiment. The fact that it became one of his best-selling songs is (to my mind) just another part of the joke.
And on top of everything else, there's a video. The version below is the best I could find on YouTube, but you can see the thing pretty much in its entirety and without the weird sparkly bits around the edges here on Facebook.