111968536689 has 9 divisors (see below), whose sum is σ = 161733780793. Its totient is φ = 74645021892.

The previous prime is 111968536643. The next prime is 111968536747. The reversal of 111968536689 is 986635869111.

The square root of 111968536689 is 334617.

It is a perfect power (a square), and thus also a powerful number.

111968536689 is a `hidden beast` number, since 1 + 1 + 1 + 96 + 8 + 536 + 6 + 8 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 111968536689 - 2³⁵ = 77608798321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111968516689) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 948082 + ... + 1059620.

Almost surely, 2^111968536689 is an apocalyptic number.

111968536689 is the 334617-th square number.

111968536689 is the 167309-th centered octagonal number.

It is an amenable number.

111968536689 is a deficient number, since it is larger than the sum of its proper divisors (49765244104).

111968536689 is an frugal number, since it uses more digits than its factorization.

111968536689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223084 (or 111542 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 111968536689 in words is "one hundred eleven billion, nine hundred sixty-eight million, five hundred thirty-six thousand, six hundred eighty-nine".