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68986959689860 = 22511533407878083
BaseRepresentation
bin11111010111110010001110…
…01110011111100010000100
3100001021002101211112221201221
433223321013032133202010
533020240243140033420
6402420101033530124
720350100113050052
oct1753710716374204
9301232354487657
1068986959689860
111aa88229293213
1278a2175273944
132c65599bc4724
141306db559d1d2
157e9798518caa
hex3ebe4739f884

68986959689860 has 48 divisors (see below), whose sum is σ = 145040987863296. Its totient is φ = 27562727043072.

The previous prime is 68986959689833. The next prime is 68986959689917. The reversal of 68986959689860 is 6898695968986.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78126379 + ... + 79004461.

It is an arithmetic number, because the mean of its divisors is an integer number (3021687247152).

Almost surely, 268986959689860 is an apocalyptic number.

It is an amenable number.

68986959689860 is an abundant number, since it is smaller than the sum of its proper divisors (76054028173436).

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

68986959689860 is a wasteful number, since it uses less digits than its factorization.

68986959689860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882652 (or 882650 counting only the distinct ones).

The product of its (nonzero) digits is 174142586880, while the sum is 97.

The spelling of 68986959689860 in words is "sixty-eight trillion, nine hundred eighty-six billion, nine hundred fifty-nine million, six hundred eighty-nine thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 20 1153 2306 3407 4612 5765 6814 11530 13628 17035 23060 34070 68140 878083 1756166 3512332 3928271 4390415 7856542 8780830 15713084 17561660 19641355 39282710 78565420 1012429699 2024859398 2991628781 4049718796 5062148495 5983257562 10124296990 11966515124 14958143905 20248593980 29916287810 59832575620 3449347984493 6898695968986 13797391937972 17246739922465 34493479844930 68986959689860