It is theoretically possible to make towel root run* on the Note 4. This does not mean it will work. If someone wanted too they could dpkg the towelroot.apk and change the scripting to enable the root exploit on the Note 4 if it is in there. The other option would be to dpkg it and pull the binary, and then use adb to run the binary on the phone. If I remember correctly he used libexploit.so to run.