| Base | Representation |
|---|---|
| bin | 101101010101101111010011… |
| … | …010001000111000110000000 |
| 3 | 222011001000201101010220200100 |
| 4 | 231111233103101013012000 |
| 5 | 202114031432212120342 |
| 6 | 1544033503033522400 |
| 7 | 60000415231241331 |
| oct | 5525572321070600 |
| 9 | 864030641126610 |
| 10 | 199405991129472 |
| 11 | 5859a673542026 |
| 12 | 1a446272b73400 |
| 13 | 8735b9a9129ca |
| 14 | 3735431320288 |
| 15 | 180c01a1a5e4c |
| hex | b55bd3447180 |
199405991129472 has 192 divisors, whose sum is σ = 576916680094560. Its totient is φ = 66109905838080.
The previous prime is 199405991129461. The next prime is 199405991129671. The reversal of 199405991129472 is 274921199504991.
199405991129472 is a `hidden beast` number, since 1 + 9 + 9 + 4 + 0 + 59 + 91 + 12 + 9 + 472 = 666.
It is a tau number, because it is divible by the number of its divisors (192).
It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.
It is a Harshad number since it is a multiple of its sum of digits (72).
It is a self number, because there is not a number n which added to its sum of digits gives 199405991129472.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163121358 + ... + 164339250.
Almost surely, 2199405991129472 is an apocalyptic number.
199405991129472 is a gapful number since it is divisible by the number (12) 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 199405991129472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288458340047280).
199405991129472 is an abundant number, since it is smaller than the sum of its proper divisors (377510688965088).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
199405991129472 is a wasteful number, since it uses less digits than its factorization.
199405991129472 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1218681 (or 1218666 counting only the distinct ones).
The product of its (nonzero) digits is 132269760, while the sum is 72.
The spelling of 199405991129472 in words is "one hundred ninety-nine trillion, four hundred five billion, nine hundred ninety-one million, one hundred twenty-nine thousand, four hundred seventy-two".
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