| Base | Representation |
|---|---|
| bin | 1111001100010110001… |
| … | …1000000100000000000 |
| 3 | 220221201101202000000000 |
| 4 | 3303011203000200000 |
| 5 | 13234023123421100 |
| 6 | 315524000000000 |
| 7 | 24600062111430 |
| oct | 3630543004000 |
| 9 | 827641660000 |
| 10 | 261012326400 |
| 11 | a0770721051 |
| 12 | 42704600000 |
| 13 | 1b7c8710c67 |
| 14 | c8c11b02c0 |
| 15 | 6bc99e0900 |
| hex | 3cc58c0800 |
261012326400 has 1440 divisors, whose sum is σ = 1139368950720. Its totient is φ = 58047528960.
The previous prime is 261012326389. The next prime is 261012326401. The reversal of 261012326400 is 4623210162.
261012326400 is a `hidden beast` number, since 2 + 6 + 1 + 0 + 12 + 3 + 2 + 640 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (1440).
It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (261012326401) by changing a digit.
It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7054387182 + ... + 7054387218.
It is an arithmetic number, because the mean of its divisors is an integer number (791228438).
Almost surely, 2261012326400 is an apocalyptic number.
261012326400 is a gapful number since it is divisible by the number (20) 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 261012326400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569684475360).
261012326400 is an abundant number, since it is smaller than the sum of its proper divisors (878356624320).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261012326400 is an frugal number, since it uses more digits than its factorization.
261012326400 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 103 (or 54 counting only the distinct ones).
The product of its (nonzero) digits is 3456, while the sum is 27.
Adding to 261012326400 its reverse (4623210162), we get a palindrome (265635536562).
The spelling of 261012326400 in words is "two hundred sixty-one billion, twelve million, three hundred twenty-six thousand, four hundred".
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