111686638907 has 16 divisors (see below), whose sum is σ = 117864720000. Its totient is φ = 105538852224.

The previous prime is 111686638901. The next prime is 111686638909. The reversal of 111686638907 is 709836686111.

It is a cyclic number.

It is not a de Polignac number, because 111686638907 - 2¹⁰ = 111686637883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111686638901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17315219 + ... + 17321667.

It is an arithmetic number, because the mean of its divisors is an integer number (7366545000).

Almost surely, 2^111686638907 is an apocalyptic number.

111686638907 is a deficient number, since it is larger than the sum of its proper divisors (6178081093).

111686638907 is a wasteful number, since it uses less digits than its factorization.

111686638907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 111686638907 in words is "one hundred eleven billion, six hundred eighty-six million, six hundred thirty-eight thousand, nine hundred seven".