| Base | Representation |
|---|---|
| bin | 101110100010000… |
| … | …0110011011100000 |
| 3 | 11000210222002210000 |
| 4 | 1131010012123200 |
| 5 | 11144201343000 |
| 6 | 414533140000 |
| 7 | 53456210211 |
| oct | 13504063340 |
| 9 | 4023862700 |
| 10 | 1561356000 |
| 11 | 731387966 |
| 12 | 376a8a600 |
| 13 | 1bb6254b9 |
| 14 | 10b515408 |
| 15 | 92119000 |
| hex | 5d1066e0 |
1561356000 has 480 divisors, whose sum is σ = 5898372480. Its totient is φ = 404352000.
The previous prime is 1561355981. The next prime is 1561356023. The reversal of 1561356000 is 6531651.
It is a happy number.
1561356000 is a `hidden beast` number, since 1 + 56 + 1 + 3 + 5 + 600 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (480).
It is a Harshad number since it is a multiple of its sum of digits (27).
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 79 ways as a sum of consecutive naturals, for example, 19763961 + ... + 19764039.
It is an arithmetic number, because the mean of its divisors is an integer number (12288276).
Almost surely, 21561356000 is an apocalyptic number.
1561356000 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 1561356000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2949186240).
1561356000 is an abundant number, since it is smaller than the sum of its proper divisors (4337016480).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1561356000 is an equidigital number, since it uses as much as digits as its factorization.
1561356000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 177 (or 150 counting only the distinct ones).
The product of its (nonzero) digits is 2700, while the sum is 27.
The square root of 1561356000 is about 39513.9975198663. The cubic root of 1561356000 is about 1160.1139404528.
Adding to 1561356000 its reverse (6531651), we get a palindrome (1567887651).
The spelling of 1561356000 in words is "one billion, five hundred sixty-one million, three hundred fifty-six thousand".
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