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68282568296720 = 2456133142272899
BaseRepresentation
bin11111000011010010001100…
…01110100100100100010000
322221202202020120212200002122
433201221012032210210100
532422220144440443340
6401120325005433412
720245152461023061
oct1741510616444420
9287682216780078
1068282568296720
111a836524753998
1277a9751b6b868
132c14031a1920b
1412c0c72d80568
157d62bdb77db5
hex3e1a463a4910

68282568296720 has 80 divisors (see below), whose sum is σ = 161847039489600. Its totient is φ = 26784108172800.

The previous prime is 68282568296699. The next prime is 68282568296729. The reversal of 68282568296720 is 2769286528286.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (68282568296729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19521170 + ... + 22751729.

It is an arithmetic number, because the mean of its divisors is an integer number (2023087993620).

Almost surely, 268282568296720 is an apocalyptic number.

It is an amenable number.

68282568296720 is an abundant number, since it is smaller than the sum of its proper divisors (93564471192880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68282568296720 is a wasteful number, since it uses less digits than its factorization.

68282568296720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42273304 (or 42273298 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 71.

The spelling of 68282568296720 in words is "sixty-eight trillion, two hundred eighty-two billion, five hundred sixty-eight million, two hundred ninety-six thousand, seven hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 40 61 80 122 244 305 331 488 610 662 976 1220 1324 1655 2440 2648 3310 4880 5296 6620 13240 20191 26480 40382 80764 100955 161528 201910 323056 403820 807640 1615280 42272899 84545798 169091596 211364495 338183192 422728990 676366384 845457980 1690915960 2578646839 3381831920 5157293678 10314587356 12893234195 13992329569 20629174712 25786468390 27984659138 41258349424 51572936780 55969318276 69961647845 103145873560 111938636552 139923295690 206291747120 223877273104 279846591380 559693182760 853532103709 1119386365520 1707064207418 3414128414836 4267660518545 6828256829672 8535321037090 13656513659344 17070642074180 34141284148360 68282568296720