11115544551111 has 96 divisors (see below), whose sum is σ = 22140053365248. Its totient is φ = 5186073496320.

The previous prime is 11115544551103. The next prime is 11115544551131.

11115544551111 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 55 + 44 + 551 + 1 + 11 = 666.

11115544551111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11115544551111 - 2³ = 11115544551103 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115544551101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16340001 + ... + 17006666.

It is an arithmetic number, because the mean of its divisors is an integer number (230625555888).

Almost surely, 2^{11115544551111} is an apocalyptic number.

11115544551111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11115544551111 is a deficient number, since it is larger than the sum of its proper divisors (11024508814137).

11115544551111 is a wasteful number, since it uses less digits than its factorization.

11115544551111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33346741 (or 33346738 counting only the distinct ones).

The product of its digits is 10000, while the sum is 36.

It can be divided in two parts, 1111554 and 4551111, that added together give a palindrome (5662665).

The spelling of 11115544551111 in words is "eleven trillion, one hundred fifteen billion, five hundred forty-four million, five hundred fifty-one thousand, one hundred eleven".