Q: Is 6,404,640 a Prime Number?
A: No, 6,404,640 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6404640 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 32 33 40 44 48 55 60 66 80 88 96 110 120 132 160 165 176 220 240 264 330 352 440 480 528 660 880 1,056 1,213 1,320 1,760 2,426 2,640 3,639 4,852 5,280 6,065 7,278 9,704 12,130 13,343 14,556 18,195 19,408 24,260 26,686 29,112 36,390 38,816 40,029 48,520 53,372 58,224 66,715 72,780 80,058 97,040 106,744 116,448 133,430 145,560 160,116 194,080 200,145 213,488 266,860 291,120 320,232 400,290 426,976 533,720 582,240 640,464 800,580 1,067,440 1,280,928 1,601,160 2,134,880 3,202,320 and 6,404,640, with no remainder.
Since 6,404,640 cannot be divided by just 1 and 6,404,640, it is not a prime number.