115105868887 has 4 divisors (see below), whose sum is σ = 115741813096. Its totient is φ = 114469924680.

The previous prime is 115105868879. The next prime is 115105868903. The reversal of 115105868887 is 788868501511.

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

It is a cyclic number.

It is not a de Polignac number, because 115105868887 - 2³ = 115105868879 is a prime.

It is a super-2 number, since 2×115105868887² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115105868827) 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 in 3 ways as a sum of consecutive naturals, for example, 317971833 + ... + 317972194.

It is an arithmetic number, because the mean of its divisors is an integer number (28935453274).

Almost surely, 2^115105868887 is an apocalyptic number.

115105868887 is a deficient number, since it is larger than the sum of its proper divisors (635944209).

115105868887 is an equidigital number, since it uses as much as digits as its factorization.

115105868887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635944208.

The product of its (nonzero) digits is 4300800, while the sum is 58.

The spelling of 115105868887 in words is "one hundred fifteen billion, one hundred five million, eight hundred sixty-eight thousand, eight hundred eighty-seven".