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68651676708 = 22317336527827
BaseRepresentation
bin111111111011111101…
…010111010000100100
320120012110020112000220
4333323331113100210
52111044312123313
651312123404340
74650152423646
oct777375272044
9216173215026
1068651676708
112712a0998aa
121137b3836b0
136620cc0514
143473916896
151bbc077823
hexffbf57424

68651676708 has 24 divisors (see below), whose sum is σ = 169610025312. Its totient is φ = 21537780864.

The previous prime is 68651676701. The next prime is 68651676721. The reversal of 68651676708 is 80767615686.

It is not an unprimeable number, because it can be changed into a prime (68651676701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168263710 + ... + 168264117.

It is an arithmetic number, because the mean of its divisors is an integer number (7067084388).

Almost surely, 268651676708 is an apocalyptic number.

68651676708 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68651676708 is an abundant number, since it is smaller than the sum of its proper divisors (100958348604).

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

68651676708 is a wasteful number, since it uses less digits than its factorization.

68651676708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336527851 (or 336527849 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 68651676708 in words is "sixty-eight billion, six hundred fifty-one million, six hundred seventy-six thousand, seven hundred eight".

Divisors: 1 2 3 4 6 12 17 34 51 68 102 204 336527827 673055654 1009583481 1346111308 2019166962 4038333924 5720973059 11441946118 17162919177 22883892236 34325838354 68651676708