| Base | Representation |
|---|---|
| bin | 10010101000001101001… |
| … | …00110011101000000000 |
| 3 | 2021012002220122012202200 |
| 4 | 21110012210303220000 |
| 5 | 40441320433022130 |
| 6 | 1210012324313200 |
| 7 | 64146202651641 |
| oct | 11240644635000 |
| 9 | 2235086565680 |
| 10 | 640060439040 |
| 11 | 2274a2482360 |
| 12 | a406ab42800 |
| 13 | 484853b17c9 |
| 14 | 22d9c8a56c8 |
| 15 | 119b1ce2760 |
| hex | 9506933a00 |
640060439040 has 480 divisors, whose sum is σ = 2435759726400. Its totient is φ = 154041384960.
The previous prime is 640060439033. The next prime is 640060439087. The reversal of 640060439040 is 40934060046.
640060439040 is a `hidden beast` number, since 6 + 4 + 0 + 0 + 604 + 3 + 9 + 0 + 40 = 666.
It is a tau number, because it is divible by the number of its divisors (480).
It is a super-2 number, since 2×6400604390402 (a number of 24 digits) contains 22 as substring.
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 = 640060438986 and 640060439004.
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, 35219076 + ... + 35237244.
It is an arithmetic number, because the mean of its divisors is an integer number (5074499430).
Almost surely, 2640060439040 is an apocalyptic number.
640060439040 is a gapful number since it is divisible by the number (60) 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 640060439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217879863200).
640060439040 is an abundant number, since it is smaller than the sum of its proper divisors (1795699287360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
640060439040 is a wasteful number, since it uses less digits than its factorization.
640060439040 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 18348 (or 18329 counting only the distinct ones).
The product of its (nonzero) digits is 62208, while the sum is 36.
Adding to 640060439040 its reverse (40934060046), we get a palindrome (680994499086).
The spelling of 640060439040 in words is "six hundred forty billion, sixty million, four hundred thirty-nine thousand, forty".
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