In 1965 I lived in Tripoli, Libya and saw these planes at the Tripoli airport. They caught my attention, the Cold War was going on and these airliners were versions of the TU-95 Bear bombers, they even had the bomber type nose.
Briefly: This is a swept wing, turboprop airliner, having more than 56,000 HP from it's four engines. Top speed was .76 Mach, cruise was .71, compare that to turbojet airliners of the day which cruised at .83 Mach. Total passenger load was 224, but 170 pax was more usual. Fuel burn in cruise, after burning off some fuel, was about 2500 lb/engine/hour, less than the turbojet powered airliners.
This was a loud airliner, having significant vibration. Vibration reduced the fatigue lift to about 14,000 hours total. These planes began service in the early 60's and continued till about 1976, when most planes had exceeded their fatigue life.
Safety and reliability was very good, the TU-144 had no fatalities from flight crashes.
I'm thankful I got to see these planes in normal operations.