518230936309 has 2 divisors, whose sum is σ = 518230936310. Its totient is φ = 518230936308.

The previous prime is 518230936271. The next prime is 518230936331. The reversal of 518230936309 is 903639032815.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382035248100 + 136195688209 = 618090^2 + 369047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518230936309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518230936339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259115468154 + 259115468155.

It is an arithmetic number, because the mean of its divisors is an integer number (259115468155).

Almost surely, 2^518230936309 is an apocalyptic number.

It is an amenable number.

518230936309 is a deficient number, since it is larger than the sum of its proper divisors (1).

518230936309 is an equidigital number, since it uses as much as digits as its factorization.

518230936309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 518230936309 in words is "five hundred eighteen billion, two hundred thirty million, nine hundred thirty-six thousand, three hundred nine".