27384806389 has 2 divisors, whose sum is σ = 27384806390. Its totient is φ = 27384806388.

The previous prime is 27384806377. The next prime is 27384806417. The reversal of 27384806389 is 98360848372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26452420164 + 932386225 = 162642^2 + 30535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27384806389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27384806359) 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, 13692403194 + 13692403195.

It is an arithmetic number, because the mean of its divisors is an integer number (13692403195).

Almost surely, 2^27384806389 is an apocalyptic number.

It is an amenable number.

27384806389 is a deficient number, since it is larger than the sum of its proper divisors (1).

27384806389 is an equidigital number, since it uses as much as digits as its factorization.

27384806389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 27384806389 in words is "twenty-seven billion, three hundred eighty-four million, eight hundred six thousand, three hundred eighty-nine".