27286319869 has 2 divisors, whose sum is σ = 27286319870. Its totient is φ = 27286319868.

The previous prime is 27286319867. The next prime is 27286319891. The reversal of 27286319869 is 96891368272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22021076025 + 5265243844 = 148395^2 + 72562^2 .

It is a cyclic number.

It is not a de Polignac number, because 27286319869 - 2¹ = 27286319867 is a prime.

It is a super-2 number, since 2×27286319869² (a number of 22 digits) contains 22 as substring.

Together with 27286319867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27286319867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13643159934 + 13643159935.

It is an arithmetic number, because the mean of its divisors is an integer number (13643159935).

Almost surely, 2^27286319869 is an apocalyptic number.

It is an amenable number.

27286319869 is a deficient number, since it is larger than the sum of its proper divisors (1).

27286319869 is an equidigital number, since it uses as much as digits as its factorization.

27286319869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 61.

The spelling of 27286319869 in words is "twenty-seven billion, two hundred eighty-six million, three hundred nineteen thousand, eight hundred sixty-nine".