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68880586080 = 2535452331727
BaseRepresentation
bin100000000100110011…
…0100101010101100000
320120210101222022122210
41000021212211111200
52112031412223310
651350542002120
74655632215135
oct1001146452540
9216711868583
1068880586080
11272373278a9
1211423b76340
13665955a257
1434960a258c
151bd21e2820
hex10099a5560

68880586080 has 96 divisors (see below), whose sum is σ = 217028657664. Its totient is φ = 18363516416.

The previous prime is 68880586069. The next prime is 68880586081. The reversal of 68880586080 is 8068508886.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 68880586080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68880586081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155177 + ... + 2186903.

It is an arithmetic number, because the mean of its divisors is an integer number (2260715184).

Almost surely, 268880586080 is an apocalyptic number.

68880586080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68880586080 is an abundant number, since it is smaller than the sum of its proper divisors (148148071584).

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

68880586080 is a wasteful number, since it uses less digits than its factorization.

68880586080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36268 (or 36260 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 57.

The spelling of 68880586080 in words is "sixty-eight billion, eight hundred eighty million, five hundred eighty-six thousand, eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 80 96 120 160 240 480 4523 9046 13569 18092 22615 27138 31727 36184 45230 54276 63454 67845 72368 90460 95181 108552 126908 135690 144736 158635 180920 190362 217104 253816 271380 317270 361840 380724 434208 475905 507632 542760 634540 723680 761448 951810 1015264 1085520 1269080 1522896 1903620 2171040 2538160 3045792 3807240 5076320 7614480 15228960 143501221 287002442 430503663 574004884 717506105 861007326 1148009768 1435012210 1722014652 2152518315 2296019536 2870024420 3444029304 4305036630 4592039072 5740048840 6888058608 8610073260 11480097680 13776117216 17220146520 22960195360 34440293040 68880586080