115905051439 has 4 divisors (see below), whose sum is σ = 118091939256. Its totient is φ = 113718163624.

The previous prime is 115905051421. The next prime is 115905051481. The reversal of 115905051439 is 934150509511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115905051439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115905051395 and 115905051404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115905051539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093443829 + ... + 1093443934.

It is an arithmetic number, because the mean of its divisors is an integer number (29522984814).

Almost surely, 2^115905051439 is an apocalyptic number.

115905051439 is a deficient number, since it is larger than the sum of its proper divisors (2186887817).

115905051439 is an equidigital number, since it uses as much as digits as its factorization.

115905051439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186887816.

The product of its (nonzero) digits is 121500, while the sum is 43.

The spelling of 115905051439 in words is "one hundred fifteen billion, nine hundred five million, fifty-one thousand, four hundred thirty-nine".