Base | Representation |
---|---|
bin | 1001011111101010000… |
… | …0111010011100111100 |
3 | 120121000212220000210100 |
4 | 2113322200322130330 |
5 | 10133030340100410 |
6 | 202533525241100 |
7 | 14533120155132 |
oct | 2277240723474 |
9 | 517025800710 |
10 | 163116721980 |
11 | 631a5156553 |
12 | 27743563190 |
13 | 124c6b9b004 |
14 | 7c75821752 |
15 | 439a3da8c0 |
hex | 25fa83a73c |
163116721980 has 144 divisors (see below), whose sum is σ = 504703180800. Its totient is φ = 42632625024.
The previous prime is 163116721967. The next prime is 163116721997. The reversal of 163116721980 is 89127611361.
163116721980 is a `hidden beast` number, since 1 + 631 + 1 + 6 + 7 + 2 + 1 + 9 + 8 + 0 = 666.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2365957 + ... + 2433923.
It is an arithmetic number, because the mean of its divisors is an integer number (3504883200).
Almost surely, 2163116721980 is an apocalyptic number.
163116721980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 163116721980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252351590400).
163116721980 is an abundant number, since it is smaller than the sum of its proper divisors (341586458820).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
163116721980 is a wasteful number, since it uses less digits than its factorization.
163116721980 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 68248 (or 68243 counting only the distinct ones).
The product of its (nonzero) digits is 108864, while the sum is 45.
The spelling of 163116721980 in words is "one hundred sixty-three billion, one hundred sixteen million, seven hundred twenty-one thousand, nine hundred eighty".
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