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68801789287 = 711893529731
BaseRepresentation
bin100000000010011100…
…1111111110101100111
320120120220201000210001
41000010321333311213
52111401224224122
651335045042131
74653654362650
oct1000471776547
9216526630701
1068801789287
11271a68a8690
12114016b6347
13664612b72a
143489830527
151bca32a527
hex1004e7fd67

68801789287 has 8 divisors (see below), whose sum is σ = 85778854272. Its totient is φ = 53611783800.

The previous prime is 68801789281. The next prime is 68801789291. The reversal of 68801789287 is 78298710886.

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

It is a cyclic number.

It is not a de Polignac number, because 68801789287 - 215 = 68801756519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68801789281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446764789 + ... + 446764942.

It is an arithmetic number, because the mean of its divisors is an integer number (10722356784).

Almost surely, 268801789287 is an apocalyptic number.

68801789287 is a deficient number, since it is larger than the sum of its proper divisors (16977064985).

68801789287 is a wasteful number, since it uses less digits than its factorization.

68801789287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893529749.

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 68801789287 in words is "sixty-eight billion, eight hundred one million, seven hundred eighty-nine thousand, two hundred eighty-seven".

Divisors: 1 7 11 77 893529731 6254708117 9828827041 68801789287