518934108647 has 2 divisors, whose sum is σ = 518934108648. Its totient is φ = 518934108646.

The previous prime is 518934108643. The next prime is 518934108677. The reversal of 518934108647 is 746801439815.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518934108647 - 2² = 518934108643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518934108592 and 518934108601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518934108643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259467054323 + 259467054324.

It is an arithmetic number, because the mean of its divisors is an integer number (259467054324).

Almost surely, 2^518934108647 is an apocalyptic number.

518934108647 is a deficient number, since it is larger than the sum of its proper divisors (1).

518934108647 is an equidigital number, since it uses as much as digits as its factorization.

518934108647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 518934108647 in words is "five hundred eighteen billion, nine hundred thirty-four million, one hundred eight thousand, six hundred forty-seven".