I'm 56 same diagnosis as you except mine is on the left side and the surgeon said no possibility of sparing and therefore I'd have no feelings in penis afterwards, my UK doctor recommended surgery as radiotherapy causes issues in 15 years time.
I'm fortunate to have access to Spain's medical system, the surgeon there said, you should consider radiotherapy because, with surgery 1. No penis use 2. Very high risk of incontinence because I'm overweight 3. Because with surgery it's unlikely to capture 100% and I'll need radio.
With radiotherapy, some ed, lower risk of incontinence, I can have the op later on if my PSA rises. She also added you'll be 72 in 15 years, how long do you want to live? You are aware we have euthanasia here.
I've started hormone treatment and I start my radiotherapy in October (scheduled around me looking after my granddaughter)