| Base | Representation |
|---|---|
| bin | 1001110110010110… |
| … | …0011100011011000 |
| 3 | 20211020220101220000 |
| 4 | 2131211203203120 |
| 5 | 20403312232424 |
| 6 | 1114203133000 |
| 7 | 122342335401 |
| oct | 23545434330 |
| 9 | 6736811800 |
| 10 | 2643867864 |
| 11 | 1137438070 |
| 12 | 619514160 |
| 13 | 331992171 |
| 14 | 1b11c09a8 |
| 15 | 1071983c9 |
| hex | 9d9638d8 |
2643867864 has 160 divisors (see below), whose sum is σ = 8190761040. Its totient is φ = 790041600.
The previous prime is 2643867859. The next prime is 2643867869. The reversal of 2643867864 is 4687683462.
2643867864 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 (2643867859) and next prime (2643867869).
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a self number, because there is not a number n which added to its sum of digits gives 2643867864.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2643867869) by changing a digit.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 517804 + ... + 522884.
Almost surely, 22643867864 is an apocalyptic number.
2643867864 is a gapful number since it is divisible by the number (24) 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 2643867864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4095380520).
2643867864 is an abundant number, since it is smaller than the sum of its proper divisors (5546893176).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2643867864 is a wasteful number, since it uses less digits than its factorization.
2643867864 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5183 (or 5170 counting only the distinct ones).
The product of its digits is 9289728, while the sum is 54.
The square root of 2643867864 is about 51418.5556389909. Note that the first 3 decimals coincide. The cubic root of 2643867864 is about 1382.7592807119.
The spelling of 2643867864 in words is "two billion, six hundred forty-three million, eight hundred sixty-seven thousand, eight hundred sixty-four".
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