111866489568 has 144 divisors (see below), whose sum is σ = 332130183840. Its totient is φ = 35648397312.

The previous prime is 111866489543. The next prime is 111866489681. The reversal of 111866489568 is 865984668111.

111866489568 is a `hidden beast` number, since 1 + 1 + 1 + 8 + 6 + 64 + 8 + 9 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×111866489568² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17278780 + ... + 17285252.

It is an arithmetic number, because the mean of its divisors is an integer number (2306459610).

Almost surely, 2^111866489568 is an apocalyptic number.

111866489568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111866489568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166065091920).

111866489568 is an abundant number, since it is smaller than the sum of its proper divisors (220263694272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111866489568 is a wasteful number, since it uses less digits than its factorization.

111866489568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9121 (or 9110 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 63.

The spelling of 111866489568 in words is "one hundred eleven billion, eight hundred sixty-six million, four hundred eighty-nine thousand, five hundred sixty-eight".