| Base | Representation |
|---|---|
| bin | 1110100111110… |
| … | …1010010000000 |
| 3 | 11021101220201020 |
| 4 | 3221331102000 |
| 5 | 111200034220 |
| 6 | 10030305440 |
| 7 | 1343205204 |
| oct | 351752200 |
| 9 | 137356636 |
| 10 | 61330560 |
| 11 | 3168a615 |
| 12 | 18658280 |
| 13 | c924795 |
| 14 | 8206b04 |
| 15 | 55b7040 |
| hex | 3a7d480 |
61330560 has 128 divisors (see below), whose sum is σ = 207100800. Its totient is φ = 15384576.
The previous prime is 61330519. The next prime is 61330567. The reversal of 61330560 is 6503316.
It is a tau number, because it is divible by the number of its divisors (128).
It is a super-2 number, since 2×613305602 = 7522875179827200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a self number, because there is not a number n which added to its sum of digits gives 61330560.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (61330567) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31701 + ... + 33579.
It is an arithmetic number, because the mean of its divisors is an integer number (1617975).
Almost surely, 261330560 is an apocalyptic number.
61330560 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 61330560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103550400).
61330560 is an abundant number, since it is smaller than the sum of its proper divisors (145770240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61330560 is a wasteful number, since it uses less digits than its factorization.
61330560 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1918 (or 1906 counting only the distinct ones).
The product of its (nonzero) digits is 1620, while the sum is 24.
The square root of 61330560 is about 7831.3830196205. The cubic root of 61330560 is about 394.3595024982.
Adding to 61330560 its reverse (6503316), we get a palindrome (67833876).
The spelling of 61330560 in words is "sixty-one million, three hundred thirty thousand, five hundred sixty".
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