115405866439 has 2 divisors, whose sum is σ = 115405866440. Its totient is φ = 115405866438.

The previous prime is 115405866403. The next prime is 115405866557. The reversal of 115405866439 is 934668504511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115405866439 - 2³¹ = 113258382791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115405863439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57702933219 + 57702933220.

It is an arithmetic number, because the mean of its divisors is an integer number (57702933220).

Almost surely, 2^115405866439 is an apocalyptic number.

115405866439 is a deficient number, since it is larger than the sum of its proper divisors (1).

115405866439 is an equidigital number, since it uses as much as digits as its factorization.

115405866439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 115405866439 in words is "one hundred fifteen billion, four hundred five million, eight hundred sixty-six thousand, four hundred thirty-nine".