27380527309 has 2 divisors, whose sum is σ = 27380527310. Its totient is φ = 27380527308.

The previous prime is 27380527303. The next prime is 27380527333. The reversal of 27380527309 is 90372508372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23280046084 + 4100481225 = 152578^2 + 64035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27380527309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27380527303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13690263654 + 13690263655.

It is an arithmetic number, because the mean of its divisors is an integer number (13690263655).

Almost surely, 2^27380527309 is an apocalyptic number.

It is an amenable number.

27380527309 is a deficient number, since it is larger than the sum of its proper divisors (1).

27380527309 is an equidigital number, since it uses as much as digits as its factorization.

27380527309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 27380527309 in words is "twenty-seven billion, three hundred eighty million, five hundred twenty-seven thousand, three hundred nine".