112720642218 has 24 divisors (see below), whose sum is σ = 245783657028. Its totient is φ = 37334224512.

The previous prime is 112720642217. The next prime is 112720642231. The reversal of 112720642218 is 812246027211.

112720642218 is a `hidden beast` number, since 1 + 1 + 2 + 7 + 2 + 0 + 642 + 2 + 1 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 108328531689 + 4392110529 = 329133^2 + 66273^2 .

It is not an unprimeable number, because it can be changed into a prime (112720642211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19940671 + ... + 19946322.

Almost surely, 2^112720642218 is an apocalyptic number.

112720642218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

112720642218 is an abundant number, since it is smaller than the sum of its proper divisors (133063014810).

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

112720642218 is a wasteful number, since it uses less digits than its factorization.

112720642218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39887158 (or 39887155 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

Adding to 112720642218 its reverse (812246027211), we get a palindrome (924966669429).

The spelling of 112720642218 in words is "one hundred twelve billion, seven hundred twenty million, six hundred forty-two thousand, two hundred eighteen".