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68104266780 = 223511217551809
BaseRepresentation
bin111111011011010101…
…001010010000011100
320111210022012012210010
4333123111022100130
52103434143014110
651141530443220
74630454500434
oct773325122034
9214708165703
1068104266780
11269790a0700
1211247b93510
136564778c14
143420d3d2c4
151b88e97020
hexfdb54a41c

68104266780 has 144 divisors (see below), whose sum is σ = 221933567520. Its totient is φ = 15538913280.

The previous prime is 68104266773. The next prime is 68104266781. The reversal of 68104266780 is 8766240186.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68104266781) 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 47 ways as a sum of consecutive naturals, for example, 152485 + ... + 399324.

It is an arithmetic number, because the mean of its divisors is an integer number (1541205330).

Almost surely, 268104266780 is an apocalyptic number.

68104266780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68104266780 is an abundant number, since it is smaller than the sum of its proper divisors (153829300740).

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

68104266780 is a wasteful number, since it uses less digits than its factorization.

68104266780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551860 (or 551847 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 68104266780 in words is "sixty-eight billion, one hundred four million, two hundred sixty-six thousand, seven hundred eighty".

Divisors: 1 2 3 4 5 6 10 11 12 15 17 20 22 30 33 34 44 51 55 60 66 68 85 102 110 121 132 165 170 187 204 220 242 255 330 340 363 374 484 510 561 605 660 726 748 935 1020 1122 1210 1452 1815 1870 2057 2244 2420 2805 3630 3740 4114 5610 6171 7260 8228 10285 11220 12342 20570 24684 30855 41140 61710 123420 551809 1103618 1655427 2207236 2759045 3310854 5518090 6069899 6621708 8277135 9380753 11036180 12139798 16554270 18209697 18761506 24279596 28142259 30349495 33108540 36419394 37523012 46903765 56284518 60698990 66768889 72838788 91048485 93807530 103188283 112569036 121397980 133537778 140711295 182096970 187615060 200306667 206376566 267075556 281422590 309564849 333844445 364193940 400613334 412753132 515941415 562845180 619129698 667688890 801226668 1001533335 1031882830 1135071113 1238259396 1335377780 1547824245 2003066670 2063765660 2270142226 3095648490 3405213339 4006133340 4540284452 5675355565 6191296980 6810426678 11350711130 13620853356 17026066695 22701422260 34052133390 68104266780