111388965717 has 16 divisors (see below), whose sum is σ = 165531591360. Its totient is φ = 66212635392.

The previous prime is 111388965713. The next prime is 111388965749. The reversal of 111388965717 is 717569883111.

It is not a de Polignac number, because 111388965717 - 2² = 111388965713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111388965713) 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 15 ways as a sum of consecutive naturals, for example, 57475278 + ... + 57477215.

It is an arithmetic number, because the mean of its divisors is an integer number (10345724460).

Almost surely, 2^111388965717 is an apocalyptic number.

111388965717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

111388965717 is a deficient number, since it is larger than the sum of its proper divisors (54142625643).

111388965717 is a wasteful number, since it uses less digits than its factorization.

111388965717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114952532.

The product of its digits is 2540160, while the sum is 57.

The spelling of 111388965717 in words is "one hundred eleven billion, three hundred eighty-eight million, nine hundred sixty-five thousand, seven hundred seventeen".