111986665813 has 16 divisors (see below), whose sum is σ = 125173661760. Its totient is φ = 99301795200.

The previous prime is 111986665801. The next prime is 111986665823. The reversal of 111986665813 is 318566689111.

It is a cyclic number.

It is not a de Polignac number, because 111986665813 - 2¹⁷ = 111986534741 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 (111986665823) 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 15 ways as a sum of consecutive naturals, for example, 2319958 + ... + 2367736.

It is an arithmetic number, because the mean of its divisors is an integer number (7823353860).

Almost surely, 2^111986665813 is an apocalyptic number.

It is an amenable number.

111986665813 is a deficient number, since it is larger than the sum of its proper divisors (13186995947).

111986665813 is a wasteful number, since it uses less digits than its factorization.

111986665813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53028.

The product of its digits is 1866240, while the sum is 55.

The spelling of 111986665813 in words is "one hundred eleven billion, nine hundred eighty-six million, six hundred sixty-five thousand, eight hundred thirteen".