518866209219 has 4 divisors (see below), whose sum is σ = 691821612296. Its totient is φ = 345910806144.

The previous prime is 518866209091. The next prime is 518866209227. The reversal of 518866209219 is 912902668815.

It is a happy number.

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

It is not a de Polignac number, because 518866209219 - 2⁷ = 518866209091 is a prime.

It is a super-2 number, since 2×518866209219² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518866209299) 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, 86477701534 + ... + 86477701539.

It is an arithmetic number, because the mean of its divisors is an integer number (172955403074).

Almost surely, 2^518866209219 is an apocalyptic number.

518866209219 is a deficient number, since it is larger than the sum of its proper divisors (172955403077).

518866209219 is a wasteful number, since it uses less digits than its factorization.

518866209219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172955403076.

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 518866209219 in words is "five hundred eighteen billion, eight hundred sixty-six million, two hundred nine thousand, two hundred nineteen".