| Base | Representation |
|---|---|
| bin | 10111011001011010… |
| … | …10010111110000000 |
| 3 | 1012102102011200120100 |
| 4 | 23230231102332000 |
| 5 | 201211133403434 |
| 6 | 5434234442400 |
| 7 | 623164464615 |
| oct | 135455227600 |
| 9 | 35372150510 |
| 10 | 12561231744 |
| 11 | 5366540366 |
| 12 | 2526893400 |
| 13 | 1252508409 |
| 14 | 87239250c |
| 15 | 4d7b81699 |
| hex | 2ecb52f80 |
12561231744 has 192 divisors, whose sum is σ = 37511585280. Its totient is φ = 4030387200.
The previous prime is 12561231743. The next prime is 12561231791. The reversal of 12561231744 is 44713216521.
12561231744 is a `hidden beast` number, since 1 + 2 + 5 + 612 + 31 + 7 + 4 + 4 = 666.
12561231744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (192).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 12561231699 and 12561231708.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12561231743) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7534399 + ... + 7536065.
It is an arithmetic number, because the mean of its divisors is an integer number (195372840).
Almost surely, 212561231744 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12561231744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18755792640).
12561231744 is an abundant number, since it is smaller than the sum of its proper divisors (24950353536).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12561231744 is a wasteful number, since it uses less digits than its factorization.
12561231744 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1929 (or 1914 counting only the distinct ones).
The product of its digits is 40320, while the sum is 36.
The spelling of 12561231744 in words is "twelve billion, five hundred sixty-one million, two hundred thirty-one thousand, seven hundred forty-four".
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