2^64=4^32=16^16=256^8=65536^4=4294967296^2=18446744073709551616~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~祝你学习进步,更上一层楼!不明白请及时追问,满意敬请采纳,O(∩_∩)O谢谢~~
= 1.844674407371 * 10的19次方