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A number has exactly 15 composite factors. What can be the maximum number of prime factors of this number?

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Important Questions on Numbers and Their Properties

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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 74
N=204×221×238×255×…×850. How many consecutive zeroes will be there at the end of this number N?
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 75
1st 126 natural numbers are put side by side in the ascending order to create a large number N=123456…125126 . What will be the remainder when N is divided by 5625? 
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 76
When a number S is divided by 3,4, and 7 successively, remainders obtained are 2,1, and 4 respectively. What will be the remainder when the same number is divided by 84?
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 77
What is the remainder when 1714×1715×1717 is divided by 12?
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 78
N2=12345678987654321. Find N.
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 79
If a, b, c and d are distinct integers in the range 10-15 (both inclusive), find the greatest value of (a+b) (c+d).
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 80
The smallest natural number which is a perfect square and is of the form abbb lies in between:
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Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 1
How many number of zeroes will be there at the end of 12! expressed in base 6?