This installation package is not supported by this processor type

I am trying to install Libreoffice on an Acer Sw3-013 with Z3735F processor, 32 bit OS, x64 based processor, running Windows 10.

I downloaded LibreOffice_5.2.6_Win_x64 but when I try to run it I get the following error:
"This installation package is not supported by this processor type. Contact your product vendor.

You have downloaded a 64-bit version of LibreOffice, but your OS is 32-bit. You need the file without “64” in its name.

Thanks. I wondered if that might be the case but the options are x86 and x86 _64 and this is an X64 processor, not an X86 so I wasn’t sure…