518564221795 has 16 divisors (see below), whose sum is σ = 637266212352. Its totient is φ = 404874298080.

The previous prime is 518564221793. The next prime is 518564221807. The reversal of 518564221795 is 597122465815.

It is a happy number.

It is not a de Polignac number, because 518564221795 - 2¹ = 518564221793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518564221793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714997 + ... + 1244326.

It is an arithmetic number, because the mean of its divisors is an integer number (39829138272).

Almost surely, 2^518564221795 is an apocalyptic number.

518564221795 is a deficient number, since it is larger than the sum of its proper divisors (118701990557).

518564221795 is a wasteful number, since it uses less digits than its factorization.

518564221795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960602.

The product of its digits is 6048000, while the sum is 55.

The spelling of 518564221795 in words is "five hundred eighteen billion, five hundred sixty-four million, two hundred twenty-one thousand, seven hundred ninety-five".