Papaya

I was walking back from the car mechanic this morning and went past this papaya tree in someone's front lawn. They also had guava, cherimoya and banana trees. I have never seen the papaya flower so took this photo. You can see on the bottom there are a couple of more mature fruits, plus a baby fruit on the right side.
Tropical plants are so interesting - oftentimes their flowers are very thick and large. I wonder what pollinates it - perhaps a vampire bat?