Welcome to Sayno. It would help if you gave a bit more information as to what this number is for. If you google it, it seems to be for some kind of phone conferencing system: https://www.intercallonline.com/listNumbersByCode.action?confCode=2645426421

For better or worse, this is more or less a legitimate use for such numbers and there probably won't be an alternative. If you're being asked to use that number to participate in a phone conference then about the best you can do is remind the organisers that there are many other conferencing services that don't require users to pay an extortionate access fee. Starting with Zoom.