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What is this 14-digit time format from WIndows registry?

Microsoft Office 365 saves information in the registry about what time it last searched/downloaded/applied updates in a format like this:

Get-ItemProperty 'HKLM:SOFTWAREMicrosoftofficeClickToRunUpdates' | select *time

UpdateDetectionLastRunTime      : 13335538464958
UpdatesAppliedTime              : 13335413795690
DownloadTime                    : 13335365916104
UpdatesDiscoveryPeriodStartTime : 13259087464032
UpdatesBlockedTime              : 0

What is this format, and how does it convert to a standard date/time?