115781016111 has 4 divisors (see below), whose sum is σ = 154374688152. Its totient is φ = 77187344072.

The previous prime is 115781016107. The next prime is 115781016139. The reversal of 115781016111 is 111610187511.

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 115781016111 - 2² = 115781016107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115781016011) 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, 19296836016 + ... + 19296836021.

It is an arithmetic number, because the mean of its divisors is an integer number (38593672038).

Almost surely, 2^115781016111 is an apocalyptic number.

115781016111 is a deficient number, since it is larger than the sum of its proper divisors (38593672041).

115781016111 is an equidigital number, since it uses as much as digits as its factorization.

115781016111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38593672040.

The product of its (nonzero) digits is 1680, while the sum is 33.

The spelling of 115781016111 in words is "one hundred fifteen billion, seven hundred eighty-one million, sixteen thousand, one hundred eleven".