I tested loading your image and it loaded with no memory problem. The app was 64-bit ImageEn project with a TImageEnMView and a TImageEnView on Windows 8.1 with a Dell PC with 24 Meg of Ram It took much longer to load than the usual digital camera jpg files but it did load and did not cause a memory problem.
Loading an image of this size is probably only possible with 64-bit so the maximum amount of ram becomes available to hold the image. Nigel will probably provide additional comments.
I tested your image on a Win 8.1 64bit machine (Intel i7 Quad-Core 3.6 GHz, 16 GB RAM), using a 32bit (!!!) program that utilizes the latest version of ImageEn. No problems whatsoever. The application is sitting on an SSD and loaded the file in 2.07 secs.