118418642549 has 2 divisors, whose sum is σ = 118418642550. Its totient is φ = 118418642548.

The previous prime is 118418642519. The next prime is 118418642581. The reversal of 118418642549 is 945246814811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96851664100 + 21566978449 = 311210^2 + 146857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118418642549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118418642549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118418642509) 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, 59209321274 + 59209321275.

It is an arithmetic number, because the mean of its divisors is an integer number (59209321275).

Almost surely, 2^118418642549 is an apocalyptic number.

It is an amenable number.

118418642549 is a deficient number, since it is larger than the sum of its proper divisors (1).

118418642549 is an equidigital number, since it uses as much as digits as its factorization.

118418642549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 53.

The spelling of 118418642549 in words is "one hundred eighteen billion, four hundred eighteen million, six hundred forty-two thousand, five hundred forty-nine".