111111345555679 has 32 divisors (see below), whose sum is σ = 131874825019392. Its totient is φ = 91607777280000.

The previous prime is 111111345555643. The next prime is 111111345555733. The reversal of 111111345555679 is 976555543111111.

It is a cyclic number.

It is not a de Polignac number, because 111111345555679 - 2⁹ = 111111345555167 is a prime.

It is a super-2 number, since 2×111111345555679² (a number of 29 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111342555679) 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 31 ways as a sum of consecutive naturals, for example, 556567479 + ... + 556767079.

It is an arithmetic number, because the mean of its divisors is an integer number (4121088281856).

Almost surely, 2^{111111345555679} is an apocalyptic number.

111111345555679 is the 6666674-th heptagonal number.

111111345555679 is a deficient number, since it is larger than the sum of its proper divisors (20763479463713).

111111345555679 is a wasteful number, since it uses less digits than its factorization.

111111345555679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215167.

The product of its digits is 2835000, while the sum is 55.

The spelling of 111111345555679 in words is "one hundred eleven trillion, one hundred eleven billion, three hundred forty-five million, five hundred fifty-five thousand, six hundred seventy-nine".