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68756882500 = 2254171617809
BaseRepresentation
bin100000000001000111…
…0101100010001000100
320120110210012112020201
41000002032230101010
52111303230220000
651330402340244
74652600600245
oct1000216542104
9216423175221
1068756882500
1127183516539
12113aa65a684
136639a37677
1434838a0ccc
151bc640996a
hex10023ac444

68756882500 has 60 divisors (see below), whose sum is σ = 159202210860. Its totient is φ = 25884928000.

The previous prime is 68756882489. The next prime is 68756882527. The reversal of 68756882500 is 528865786.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 55400919876 + 13355962624 = 235374^2 + 115568^2 .

It is a super-2 number, since 2×687568825002 (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 766405 + ... + 851404.

It is an arithmetic number, because the mean of its divisors is an integer number (2653370181).

Almost surely, 268756882500 is an apocalyptic number.

It is an amenable number.

68756882500 is an abundant number, since it is smaller than the sum of its proper divisors (90445328360).

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

68756882500 is a wasteful number, since it uses less digits than its factorization.

68756882500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617850 (or 1617833 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 68756882500 in words is "sixty-eight billion, seven hundred fifty-six million, eight hundred eighty-two thousand, five hundred".

Divisors: 1 2 4 5 10 17 20 25 34 50 68 85 100 125 170 250 340 425 500 625 850 1250 1700 2125 2500 4250 8500 10625 21250 42500 1617809 3235618 6471236 8089045 16178090 27502753 32356180 40445225 55005506 80890450 110011012 137513765 161780900 202226125 275027530 404452250 550055060 687568825 808904500 1011130625 1375137650 2022261250 2750275300 3437844125 4044522500 6875688250 13751376500 17189220625 34378441250 68756882500