518355081256871 has 2 divisors, whose sum is σ = 518355081256872. Its totient is φ = 518355081256870.

The previous prime is 518355081256861. The next prime is 518355081256907. The reversal of 518355081256871 is 178652180553815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518355081256871 - 2¹⁴ = 518355081240487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518355081256798 and 518355081256807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518355081256801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259177540628435 + 259177540628436.

It is an arithmetic number, because the mean of its divisors is an integer number (259177540628436).

Almost surely, 2^{518355081256871} is an apocalyptic number.

518355081256871 is a deficient number, since it is larger than the sum of its proper divisors (1).

518355081256871 is an equidigital number, since it uses as much as digits as its factorization.

518355081256871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640000, while the sum is 65.

The spelling of 518355081256871 in words is "five hundred eighteen trillion, three hundred fifty-five billion, eighty-one million, two hundred fifty-six thousand, eight hundred seventy-one".