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68878052682 = 2311479675447
BaseRepresentation
bin100000000100101110…
…0111010110101001010
320120210020012121111020
41000021130322311022
52112030240141212
651350411413310
74655601534135
oct1001134726512
9216706177436
1068878052682
112723595748a
1211423154236
136658b810ba
143495a0321c
151bd1d91d8c
hex100973ad4a

68878052682 has 8 divisors (see below), whose sum is σ = 137756105376. Its totient is φ = 22959350892.

The previous prime is 68878052653. The next prime is 68878052687. The reversal of 68878052682 is 28625087886.

It is a sphenic number, since it is the product of 3 distinct primes.

68878052682 is an admirable number.

It is a super-2 number, since 2×688780526822 (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68878052687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5739837718 + ... + 5739837729.

It is an arithmetic number, because the mean of its divisors is an integer number (17219513172).

Almost surely, 268878052682 is an apocalyptic number.

68878052682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68878052682 is a wasteful number, since it uses less digits than its factorization.

68878052682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11479675452.

The product of its (nonzero) digits is 20643840, while the sum is 60.

The spelling of 68878052682 in words is "sixty-eight billion, eight hundred seventy-eight million, fifty-two thousand, six hundred eighty-two".

Divisors: 1 2 3 6 11479675447 22959350894 34439026341 68878052682