| Base | Representation |
|---|---|
| bin | 101000100100011… |
| … | …0111111000110100 |
| 3 | 10111212111012212200 |
| 4 | 1101020313320310 |
| 5 | 10241441434224 |
| 6 | 343024544500 |
| 7 | 45506460000 |
| oct | 12110677064 |
| 9 | 3455435780 |
| 10 | 1361280564 |
| 11 | 639453266 |
| 12 | 31ba82130 |
| 13 | 189042a77 |
| 14 | ccb13700 |
| 15 | 7e7975c9 |
| hex | 51237e34 |
1361280564 has 90 divisors (see below), whose sum is σ = 4014533250. Its totient is φ = 388912608.
The previous prime is 1361280551. The next prime is 1361280577. The reversal of 1361280564 is 4650821631.
It is a happy number.
1361280564 is a `hidden beast` number, since 1 + 3 + 6 + 12 + 80 + 564 = 666.
It is an interprime number because it is at equal distance from previous prime (1361280551) and next prime (1361280577).
It can be written as a sum of positive squares in only one way, i.e., 780084900 + 581195664 = 27930^2 + 24108^2 .
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 78562 + ... + 94310.
It is an arithmetic number, because the mean of its divisors is an integer number (44605925).
Almost surely, 21361280564 is an apocalyptic number.
1361280564 is a gapful number since it is divisible by the number (14) 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 1361280564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2007266625).
1361280564 is an abundant number, since it is smaller than the sum of its proper divisors (2653252686).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1361280564 is a wasteful number, since it uses less digits than its factorization.
1361280564 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15787 (or 15761 counting only the distinct ones).
The product of its (nonzero) digits is 34560, while the sum is 36.
The square root of 1361280564 is about 36895.5358275225. The cubic root of 1361280564 is about 1108.2792818208.
The spelling of 1361280564 in words is "one billion, three hundred sixty-one million, two hundred eighty thousand, five hundred sixty-four".
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