| Base | Representation |
|---|---|
| bin | 11101011001111001010101… |
| … | …11110011110000000000000 |
| 3 | 22110221120111212211200000000 |
| 4 | 32230330222332132000000 |
| 5 | 31433403124114111120 |
| 6 | 345305021200000000 |
| 7 | 16422431046330540 |
| oct | 1654745276360000 |
| 9 | 273846455750000 |
| 10 | 64661453660160 |
| 11 | 1966a84a963765 |
| 12 | 73039a6000000 |
| 13 | 2a10719c7a436 |
| 14 | 11d78b988d320 |
| 15 | 771ed5a72990 |
| hex | 3acf2af9e000 |
64661453660160 has 2016 divisors, whose sum is σ = 273489366720960. Its totient is φ = 14364828499968.
The previous prime is 64661453660033. The next prime is 64661453660161. The reversal of 64661453660160 is 6106635416646.
64661453660160 is a `hidden beast` number, since 6 + 4 + 6 + 614 + 5 + 3 + 6 + 6 + 0 + 16 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (2016).
It is a super-2 number, since 2×646614536601602 (a number of 28 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a junction number, because it is equal to n+sod(n) for n = 64661453660097 and 64661453660106.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (64661453660161) by changing a digit.
It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 69603286576 + ... + 69603287504.
Almost surely, 264661453660160 is an apocalyptic number.
64661453660160 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 64661453660160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136744683360480).
64661453660160 is an abundant number, since it is smaller than the sum of its proper divisors (208827913060800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
64661453660160 is an frugal number, since it uses more digits than its factorization.
64661453660160 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1028 (or 983 counting only the distinct ones).
The product of its (nonzero) digits is 11197440, while the sum is 54.
The spelling of 64661453660160 in words is "sixty-four trillion, six hundred sixty-one billion, four hundred fifty-three million, six hundred sixty thousand, one hundred sixty".
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