The number 9,558,864 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 29 36 42 48 54 56 58 63 72 84 87 108 109 112 116 126 144 168 174 189 203 216 218 232 252 261 327 336 348 378 406 432 436 464 504 522 609 654 696 756 763 783 812 872 981 1,008 1,044 1,218 1,308 1,392 1,512 1,526 1,566 1,624 1,744 1,827 1,962 2,088 2,289 2,436 2,616 2,943 3,024 3,052 3,132 3,161 3,248 3,654 3,924 4,176 4,578 4,872 5,232 5,481 5,886 6,104 6,264 6,322 6,867 7,308 7,848 9,156 9,483 9,744 10,962 11,772 12,208 12,528 12,644 13,734 14,616 15,696 18,312 18,966 20,601 21,924 22,127 23,544 25,288 27,468 28,449 29,232 36,624 37,932 41,202 43,848 44,254 47,088 50,576 54,936 56,898 66,381 75,864 82,404 85,347 87,696 88,508 109,872 113,796 132,762 151,728 164,808 170,694 177,016 199,143 227,592 265,524 329,616 341,388 354,032 398,286 455,184 531,048 597,429 682,776 796,572 1,062,096 1,194,858 1,365,552 1,593,144 2,389,716 3,186,288 4,779,432 and 9,558,864, with no remainder.
Since 9,558,864 cannot be divided by just 1 and 9,558,864, it is a composite number.