518530445959 has 4 divisors (see below), whose sum is σ = 519441747840. Its totient is φ = 517619144080.

The previous prime is 518530445921. The next prime is 518530445981. The reversal of 518530445959 is 959544035815.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 518530445959 - 2¹¹ = 518530443911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518530445359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455650087 + ... + 455651224.

It is an arithmetic number, because the mean of its divisors is an integer number (129860436960).

Almost surely, 2^518530445959 is an apocalyptic number.

518530445959 is a deficient number, since it is larger than the sum of its proper divisors (911301881).

518530445959 is an equidigital number, since it uses as much as digits as its factorization.

518530445959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911301880.

The product of its (nonzero) digits is 19440000, while the sum is 58.

The spelling of 518530445959 in words is "five hundred eighteen billion, five hundred thirty million, four hundred forty-five thousand, nine hundred fifty-nine".