111556066556 has 24 divisors (see below), whose sum is σ = 224179656960. Its totient is φ = 48038497200.

The previous prime is 111556066553. The next prime is 111556066591. The reversal of 111556066556 is 655660655111.

It is a super-2 number, since 2×111556066556² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111556066556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111556066553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66719300 + ... + 66720971.

It is an arithmetic number, because the mean of its divisors is an integer number (9340819040).

Almost surely, 2^111556066556 is an apocalyptic number.

It is an amenable number.

111556066556 is an abundant number, since it is smaller than the sum of its proper divisors (112623590404).

111556066556 is a wasteful number, since it uses less digits than its factorization.

111556066556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133440305 (or 133440303 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 111556066556 in words is "one hundred eleven billion, five hundred fifty-six million, sixty-six thousand, five hundred fifty-six".