518913556243 has 2 divisors, whose sum is σ = 518913556244. Its totient is φ = 518913556242.

The previous prime is 518913556223. The next prime is 518913556363. The reversal of 518913556243 is 342655319815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518913556243 - 2⁵ = 518913556211 is a prime.

It is not a weakly prime, because it can be changed into another prime (518913556223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259456778121 + 259456778122.

It is an arithmetic number, because the mean of its divisors is an integer number (259456778122).

Almost surely, 2^518913556243 is an apocalyptic number.

518913556243 is a deficient number, since it is larger than the sum of its proper divisors (1).

518913556243 is an equidigital number, since it uses as much as digits as its factorization.

518913556243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 52.

The spelling of 518913556243 in words is "five hundred eighteen billion, nine hundred thirteen million, five hundred fifty-six thousand, two hundred forty-three".