111984598881 has 27 divisors (see below), whose sum is σ = 162728565363. Its totient is φ = 74209988160.

The previous prime is 111984598829. The next prime is 111984598909. The reversal of 111984598881 is 188895489111.

The square root of 111984598881 is 334641.

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

111984598881 is a `hidden beast` number, since 1 + 11 + 98 + 459 + 8 + 8 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30197750625 + 81786848256 = 173775^2 + 285984^2 .

It is not a de Polignac number, because 111984598881 - 2⁷ = 111984598753 is a prime.

It is a super-2 number, since 2×111984598881² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111984598681) 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 26 ways as a sum of consecutive naturals, for example, 332298345 + ... + 332298681.

Almost surely, 2^111984598881 is an apocalyptic number.

111984598881 is the 334641-st square number.

111984598881 is the 167321-st centered octagonal number.

It is an amenable number.

111984598881 is a deficient number, since it is larger than the sum of its proper divisors (50743966482).

111984598881 is an frugal number, since it uses more digits than its factorization.

111984598881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 671 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 63.

The spelling of 111984598881 in words is "one hundred eleven billion, nine hundred eighty-four million, five hundred ninety-eight thousand, eight hundred eighty-one".