| Base | Representation |
|---|---|
| bin | 1000000010001011… |
| … | …1100111011111100 |
| 3 | 12120022002222022222 |
| 4 | 2000202330323330 |
| 5 | 13404100134030 |
| 6 | 554000224512 |
| 7 | 104305122035 |
| oct | 20042747374 |
| 9 | 5508088288 |
| 10 | 2156646140 |
| 11 | a07409190 |
| 12 | 50230b138 |
| 13 | 284a6239c |
| 14 | 1665d3a8c |
| 15 | c95063e5 |
| hex | 808bcefc |
2156646140 has 48 divisors (see below), whose sum is σ = 4954328064. Its totient is φ = 782068800.
The previous prime is 2156646133. The next prime is 2156646143. The reversal of 2156646140 is 416466512.
2156646140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×21566461402 = 9302245146353799200, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 2156646140.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2156646143) 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, 67385 + ... + 94095.
It is an arithmetic number, because the mean of its divisors is an integer number (103215168).
Almost surely, 22156646140 is an apocalyptic number.
2156646140 is a gapful number since it is divisible by the number (20) 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 2156646140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2477164032).
2156646140 is an abundant number, since it is smaller than the sum of its proper divisors (2797681924).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2156646140 is a wasteful number, since it uses less digits than its factorization.
2156646140 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 27098 (or 27096 counting only the distinct ones).
The product of its (nonzero) digits is 34560, while the sum is 35.
The square root of 2156646140 is about 46439.7043487574. The cubic root of 2156646140 is about 1291.9914237083.
The spelling of 2156646140 in words is "two billion, one hundred fifty-six million, six hundred forty-six thousand, one hundred forty".
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