118517303621 has 2 divisors, whose sum is σ = 118517303622. Its totient is φ = 118517303620.

The previous prime is 118517303519. The next prime is 118517303629. The reversal of 118517303621 is 126303715811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117227488225 + 1289815396 = 342385^2 + 35914^2 .

It is a cyclic number.

It is not a de Polignac number, because 118517303621 - 2¹⁴ = 118517287237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118517303629) 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 as a sum of consecutive naturals, namely, 59258651810 + 59258651811.

It is an arithmetic number, because the mean of its divisors is an integer number (59258651811).

Almost surely, 2^118517303621 is an apocalyptic number.

It is an amenable number.

118517303621 is a deficient number, since it is larger than the sum of its proper divisors (1).

118517303621 is an equidigital number, since it uses as much as digits as its factorization.

118517303621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 118517303621 in words is "one hundred eighteen billion, five hundred seventeen million, three hundred three thousand, six hundred twenty-one".