Can does your phone still update while it's off?

I'm getting iOS 10.3.2 on my iPhone 5c. It just 1 hour remaining. I'm not waiting that long! I can't just keep clicking my phone for an hour so it won't turn off. Can it update while it's off?

The phone will update while it is in sleep mode, but not when its off. If you don't understand this:
when you tap the power button once or leave the phone on for a while, the screen goes off but the phone is in sleep mode and will continue receiving messages, updating etc.
When you hold the power button for a while the phone will completely switch off and can do nothing.

Well no. If it is off then it has no power, therefore it can't update.