Ultra-high molecular weight polyethylene powder and ultra-high molecular weight polyethylene fiber

An ultra-high molecular weight polyethylene powder having a viscosity-average molecular weight of 10×104 or higher and 1000×104 or lower, wherein

• a temperature range in which a torque value reaches ½ of the maximum torque value is 150° C. or higher and 170° C. or lower in torque value measurement under the following <kneading condition>:
• <kneading condition>
• raw material:
• a mixture containing 5 parts by mass of the ultra-high molecular weight polyethylene powder and 95 parts by mass of liquid paraffin based on 100 parts by mass in total of the ultra-high molecular weight polyethylene powder and the liquid paraffin, torque value measurement condition:
• the raw material is kneaded at 130° C. for 30 minutes and then further kneaded at 240° C. for 15 minutes;
• a heating rate from 130° C. to 240° C. is set to 22° C./min;
• a rotation number of a screw is set to 50 rpm;
• and
• the measurement is performed under a nitrogen atmosphere.