118548239981 has 2 divisors, whose sum is σ = 118548239982. Its totient is φ = 118548239980.

The previous prime is 118548239933. The next prime is 118548239983. The reversal of 118548239981 is 189932845811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96255062500 + 22293177481 = 310250^2 + 149309^2 .

It is a cyclic number.

It is not a de Polignac number, because 118548239981 - 2⁶ = 118548239917 is a prime.

It is a super-2 number, since 2×118548239981² (a number of 23 digits) contains 22 as substring.

Together with 118548239983, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118548239981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118548239983) 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, 59274119990 + 59274119991.

It is an arithmetic number, because the mean of its divisors is an integer number (59274119991).

Almost surely, 2^118548239981 is an apocalyptic number.

It is an amenable number.

118548239981 is a deficient number, since it is larger than the sum of its proper divisors (1).

118548239981 is an equidigital number, since it uses as much as digits as its factorization.

118548239981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 59.

The spelling of 118548239981 in words is "one hundred eighteen billion, five hundred forty-eight million, two hundred thirty-nine thousand, nine hundred eighty-one".