81111300311118 has 64 divisors (see below), whose sum is σ = 205270234011648. Its totient is φ = 20753424378720.

The previous prime is 81111300311099. The next prime is 81111300311137.

81111300311118 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (81111300311099) and next prime (81111300311137).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1310159980 + ... + 1310221887.

It is an arithmetic number, because the mean of its divisors is an integer number (3207347406432).

Almost surely, 2^{81111300311118} is an apocalyptic number.

81111300311118 is an abundant number, since it is smaller than the sum of its proper divisors (124158933700530).

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

81111300311118 is a wasteful number, since it uses less digits than its factorization.

81111300311118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620381957.

The product of its (nonzero) digits is 576, while the sum is 30.

It can be divided in two parts, 81111300 and 311118, that added together give a palindrome (81422418).

The spelling of 81111300311118 in words is "eighty-one trillion, one hundred eleven billion, three hundred million, three hundred eleven thousand, one hundred eighteen".