518230936321 has 4 divisors (see below), whose sum is σ = 592263927232. Its totient is φ = 444197945412.

The previous prime is 518230936309. The next prime is 518230936331. The reversal of 518230936321 is 123639032815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 518230936321 - 2⁷ = 518230936193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518230936331) 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, 37016495445 + ... + 37016495458.

It is an arithmetic number, because the mean of its divisors is an integer number (148065981808).

Almost surely, 2^518230936321 is an apocalyptic number.

It is an amenable number.

518230936321 is a deficient number, since it is larger than the sum of its proper divisors (74032990911).

518230936321 is an equidigital number, since it uses as much as digits as its factorization.

518230936321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74032990910.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 518230936321 in words is "five hundred eighteen billion, two hundred thirty million, nine hundred thirty-six thousand, three hundred twenty-one".