| Base | Representation |
|---|---|
| bin | 100101100000111010… |
| … | …0000001111100000000 |
| 3 | 21200221102211112122000 |
| 4 | 1023001310001330000 |
| 5 | 2304442112202230 |
| 6 | 101001554544000 |
| 7 | 5551243440630 |
| oct | 1130164017400 |
| 9 | 250842745560 |
| 10 | 80561053440 |
| 11 | 3119068390a |
| 12 | 13743898000 |
| 13 | 779b4454ba |
| 14 | 3c834a46c0 |
| 15 | 2167896b60 |
| hex | 12c1d01f00 |
80561053440 has 576 divisors, whose sum is σ = 338015462400. Its totient is φ = 17777442816.
The previous prime is 80561053421. The next prime is 80561053451. The reversal of 80561053440 is 4435016508.
It is a happy number.
80561053440 is a `hidden beast` number, since 8 + 0 + 5 + 610 + 5 + 34 + 4 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (576).
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 = 80561053395 and 80561053404.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7009939 + ... + 7021421.
It is an arithmetic number, because the mean of its divisors is an integer number (586832400).
Almost surely, 280561053440 is an apocalyptic number.
80561053440 is a gapful number since it is divisible by the number (80) 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 80561053440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169007731200).
80561053440 is an abundant number, since it is smaller than the sum of its proper divisors (257454408960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80561053440 is a wasteful number, since it uses less digits than its factorization.
80561053440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11549 (or 11529 counting only the distinct ones).
The product of its (nonzero) digits is 57600, while the sum is 36.
Adding to 80561053440 its reverse (4435016508), we get a palindrome (84996069948).
The spelling of 80561053440 in words is "eighty billion, five hundred sixty-one million, fifty-three thousand, four hundred forty".
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