| Base | Representation |
|---|---|
| bin | 111100011011001100… |
| … | …011110111100000000 |
| 3 | 20012110122121110000000 |
| 4 | 330123030132330000 |
| 5 | 2030333434013340 |
| 6 | 45450020000000 |
| 7 | 4454543263200 |
| oct | 743314367400 |
| 9 | 205418543000 |
| 10 | 64880766720 |
| 11 | 25574557370 |
| 12 | 106a8530000 |
| 13 | 616c99cb33 |
| 14 | 31d6b98400 |
| 15 | 1a4aea5d30 |
| hex | f1b31ef00 |
64880766720 has 1728 divisors, whose sum is σ = 302659822080. Its totient is φ = 13168189440.
The previous prime is 64880766719. The next prime is 64880766721. The reversal of 64880766720 is 2766708846.
64880766720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (64880766719) and next prime (64880766721).
It is a tau number, because it is divible by the number of its divisors (1728).
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (64880766721) by changing a digit.
It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1508855019 + ... + 1508855061.
It is an arithmetic number, because the mean of its divisors is an integer number (175150360).
Almost surely, 264880766720 is an apocalyptic number.
64880766720 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 64880766720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151329911040).
64880766720 is an abundant number, since it is smaller than the sum of its proper divisors (237779055360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
64880766720 is an equidigital number, since it uses as much as digits as its factorization.
64880766720 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 110 (or 71 counting only the distinct ones).
The product of its (nonzero) digits is 5419008, while the sum is 54.
The spelling of 64880766720 in words is "sixty-four billion, eight hundred eighty million, seven hundred sixty-six thousand, seven hundred twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.082 sec. • engine limits •