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68165018800 = 2452170412547
BaseRepresentation
bin111111011110111100…
…111010010010110000
320111221112111201212221
4333132330322102300
52104100221100200
651151540530424
74632123046144
oct773674722260
9214845451787
1068165018800
11269aa41558a
12112643b0a14
13657422a268
143429035224
151b8e49791a
hexfdef3a4b0

68165018800 has 30 divisors (see below), whose sum is σ = 163766458628. Its totient is φ = 27266007360.

The previous prime is 68165018791. The next prime is 68165018837. The reversal of 68165018800 is 881056186.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85205874 + ... + 85206673.

Almost surely, 268165018800 is an apocalyptic number.

It is an amenable number.

68165018800 is an abundant number, since it is smaller than the sum of its proper divisors (95601439828).

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

68165018800 is a wasteful number, since it uses less digits than its factorization.

68165018800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170412565 (or 170412554 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 68165018800 in words is "sixty-eight billion, one hundred sixty-five million, eighteen thousand, eight hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 170412547 340825094 681650188 852062735 1363300376 1704125470 2726600752 3408250940 4260313675 6816501880 8520627350 13633003760 17041254700 34082509400 68165018800