118517303521 has 4 divisors (see below), whose sum is σ = 118693407172. Its totient is φ = 118341199872.

The previous prime is 118517303519. The next prime is 118517303621. The reversal of 118517303521 is 125303715811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79051507921 + 39465795600 = 281161^2 + 198660^2 .

It is a cyclic number.

It is not a de Polignac number, because 118517303521 - 2¹ = 118517303519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118517303321) 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 3 ways as a sum of consecutive naturals, for example, 88050816 + ... + 88052161.

It is an arithmetic number, because the mean of its divisors is an integer number (29673351793).

Almost surely, 2^118517303521 is an apocalyptic number.

It is an amenable number.

118517303521 is a deficient number, since it is larger than the sum of its proper divisors (176103651).

118517303521 is an equidigital number, since it uses as much as digits as its factorization.

118517303521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176103650.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 118517303521 in words is "one hundred eighteen billion, five hundred seventeen million, three hundred three thousand, five hundred twenty-one".