115905051438 has 16 divisors (see below), whose sum is σ = 252883748736. Its totient is φ = 35122742840.

The previous prime is 115905051421. The next prime is 115905051481. The reversal of 115905051438 is 834150509511.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115905051438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878068506 + ... + 878068637.

It is an arithmetic number, because the mean of its divisors is an integer number (15805234296).

Almost surely, 2^115905051438 is an apocalyptic number.

115905051438 is an abundant number, since it is smaller than the sum of its proper divisors (136978697298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115905051438 is a wasteful number, since it uses less digits than its factorization.

115905051438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756137159.

The product of its (nonzero) digits is 108000, while the sum is 42.

The spelling of 115905051438 in words is "one hundred fifteen billion, nine hundred five million, fifty-one thousand, four hundred thirty-eight".