518218656773 has 2 divisors, whose sum is σ = 518218656774. Its totient is φ = 518218656772.

The previous prime is 518218656751. The next prime is 518218656833. The reversal of 518218656773 is 377656812815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360146414884 + 158072241889 = 600122^2 + 397583^2 .

It is a cyclic number.

It is not a de Polignac number, because 518218656773 - 2¹⁴ = 518218640389 is a prime.

It is a super-2 number, since 2×518218656773² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518218656733) 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 as a sum of consecutive naturals, namely, 259109328386 + 259109328387.

It is an arithmetic number, because the mean of its divisors is an integer number (259109328387).

Almost surely, 2^518218656773 is an apocalyptic number.

It is an amenable number.

518218656773 is a deficient number, since it is larger than the sum of its proper divisors (1).

518218656773 is an equidigital number, since it uses as much as digits as its factorization.

518218656773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16934400, while the sum is 59.

The spelling of 518218656773 in words is "five hundred eighteen billion, two hundred eighteen million, six hundred fifty-six thousand, seven hundred seventy-three".