718735512217 has 2 divisors, whose sum is σ = 718735512218. Its totient is φ = 718735512216.

The previous prime is 718735512203. The next prime is 718735512233. The reversal of 718735512217 is 712215537817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486277496896 + 232458015321 = 697336^2 + 482139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718735512217 is a prime.

It is not a weakly prime, because it can be changed into another prime (718735515217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359367756108 + 359367756109.

It is an arithmetic number, because the mean of its divisors is an integer number (359367756109).

Almost surely, 2^718735512217 is an apocalyptic number.

It is an amenable number.

718735512217 is a deficient number, since it is larger than the sum of its proper divisors (1).

718735512217 is an equidigital number, since it uses as much as digits as its factorization.

718735512217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 823200, while the sum is 49.

The spelling of 718735512217 in words is "seven hundred eighteen billion, seven hundred thirty-five million, five hundred twelve thousand, two hundred seventeen".