111605049999 has 6 divisors (see below), whose sum is σ = 161207294456. Its totient is φ = 74403366660.

The previous prime is 111605049977. The next prime is 111605050009. The reversal of 111605049999 is 999940506111.

It is a happy number.

111605049999 is a `hidden beast` number, since 1 + 1 + 1 + 60 + 5 + 0 + 499 + 99 = 666.

It is not a de Polignac number, because 111605049999 - 2¹¹ = 111605047951 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 (111605049499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6200280547 + ... + 6200280564.

Almost surely, 2^111605049999 is an apocalyptic number.

111605049999 is a deficient number, since it is larger than the sum of its proper divisors (49602244457).

111605049999 is a wasteful number, since it uses less digits than its factorization.

111605049999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12400561117 (or 12400561114 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The spelling of 111605049999 in words is "one hundred eleven billion, six hundred five million, forty-nine thousand, nine hundred ninety-nine".