Base | Representation |
---|---|
bin | 10111100100010011110… |
… | …11000100110111000001 |
3 | 2212102011010000020102100 |
4 | 23302021323010313001 |
5 | 101231401030113031 |
6 | 1420000250341013 |
7 | 112334541605400 |
oct | 13621173046701 |
9 | 2772133006370 |
10 | 809767816641 |
11 | 292469904a33 |
12 | 110b3172a769 |
13 | 5b48c821b34 |
14 | 2b29b729637 |
15 | 160e5ad9de6 |
hex | bc89ec4dc1 |
809767816641 has 81 divisors (see below), whose sum is σ = 1381878503811. Its totient is φ = 455608286784.
The previous prime is 809767816567. The next prime is 809767816657. The reversal of 809767816641 is 146618767908.
The square root of 809767816641 is 899871.
It is a perfect power (a square), and thus also a powerful number.
809767816641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in only one way, i.e., 459663660225 + 350104156416 = 677985^2 + 591696^2 .
It is not a de Polignac number, because 809767816641 - 29 = 809767816129 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (63).
It is not an unprimeable number, because it can be changed into a prime (809767816681) by changing a digit.
It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1379501950 + ... + 1379502536.
Almost surely, 2809767816641 is an apocalyptic number.
809767816641 is the 899871-st square number.
809767816641 is the 449936-th centered octagonal number.
It is an amenable number.
809767816641 is a deficient number, since it is larger than the sum of its proper divisors (572110687170).
809767816641 is an frugal number, since it uses more digits than its factorization.
809767816641 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1340 (or 670 counting only the distinct ones).
The product of its (nonzero) digits is 24385536, while the sum is 63.
The spelling of 809767816641 in words is "eight hundred nine billion, seven hundred sixty-seven million, eight hundred sixteen thousand, six hundred forty-one".
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