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16806065085809 is a prime number
BaseRepresentation
bin1111010010001111011110…
…0010100001110101110001
32012111122101120102211022222
43310203313202201311301
54200322310130221214
655424333312210425
73353124650134436
oct364436742416561
965448346384288
1016806065085809
11539a45967597a
121a75165239a15
1394ba60b6b54c
144215bc995b8d
151e226e8b038e
hexf48f78a1d71

16806065085809 has 2 divisors, whose sum is σ = 16806065085810. Its totient is φ = 16806065085808.

The previous prime is 16806065085781. The next prime is 16806065085811. The reversal of 16806065085809 is 90858056060861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9337131371584 + 7468933714225 = 3055672^2 + 2732935^2 .

It is a cyclic number.

It is not a de Polignac number, because 16806065085809 - 220 = 16806064037233 is a prime.

Together with 16806065085811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16806065085869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8403032542904 + 8403032542905.

It is an arithmetic number, because the mean of its divisors is an integer number (8403032542905).

Almost surely, 216806065085809 is an apocalyptic number.

It is an amenable number.

16806065085809 is a deficient number, since it is larger than the sum of its proper divisors (1).

16806065085809 is an equidigital number, since it uses as much as digits as its factorization.

16806065085809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24883200, while the sum is 62.

The spelling of 16806065085809 in words is "sixteen trillion, eight hundred six billion, sixty-five million, eighty-five thousand, eight hundred nine".