118431628489 has 2 divisors, whose sum is σ = 118431628490. Its totient is φ = 118431628488.

The previous prime is 118431628459. The next prime is 118431628561. The reversal of 118431628489 is 984826134811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118055462464 + 376166025 = 343592^2 + 19395^2 .

It is an emirp because it is prime and its reverse (984826134811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118431628489 - 2¹¹ = 118431626441 is a prime.

It is not a weakly prime, because it can be changed into another prime (118431628429) 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 as a sum of consecutive naturals, namely, 59215814244 + 59215814245.

It is an arithmetic number, because the mean of its divisors is an integer number (59215814245).

Almost surely, 2^118431628489 is an apocalyptic number.

It is an amenable number.

118431628489 is a deficient number, since it is larger than the sum of its proper divisors (1).

118431628489 is an equidigital number, since it uses as much as digits as its factorization.

118431628489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2654208, while the sum is 55.

The spelling of 118431628489 in words is "one hundred eighteen billion, four hundred thirty-one million, six hundred twenty-eight thousand, four hundred eighty-nine".