115505665111 has 4 divisors (see below), whose sum is σ = 115506344992. Its totient is φ = 115504985232.

The previous prime is 115505665069. The next prime is 115505665123. The reversal of 115505665111 is 111566505511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115505665111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115505665411) 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, 158995 + ... + 506251.

It is an arithmetic number, because the mean of its divisors is an integer number (28876586248).

Almost surely, 2^115505665111 is an apocalyptic number.

115505665111 is a deficient number, since it is larger than the sum of its proper divisors (679881).

115505665111 is an equidigital number, since it uses as much as digits as its factorization.

115505665111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679880.

The product of its (nonzero) digits is 22500, while the sum is 37.

The spelling of 115505665111 in words is "one hundred fifteen billion, five hundred five million, six hundred sixty-five thousand, one hundred eleven".