27430978117 has 2 divisors, whose sum is σ = 27430978118. Its totient is φ = 27430978116.

The previous prime is 27430978103. The next prime is 27430978163. The reversal of 27430978117 is 71187903472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18331535236 + 9099442881 = 135394^2 + 95391^2 .

It is a cyclic number.

It is not a de Polignac number, because 27430978117 - 2¹⁵ = 27430945349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27430978177) 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, 13715489058 + 13715489059.

It is an arithmetic number, because the mean of its divisors is an integer number (13715489059).

Almost surely, 2^27430978117 is an apocalyptic number.

It is an amenable number.

27430978117 is a deficient number, since it is larger than the sum of its proper divisors (1).

27430978117 is an equidigital number, since it uses as much as digits as its factorization.

27430978117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 27430978117 in words is "twenty-seven billion, four hundred thirty million, nine hundred seventy-eight thousand, one hundred seventeen".