818781366479 has 2 divisors, whose sum is σ = 818781366480. Its totient is φ = 818781366478.

The previous prime is 818781366457. The next prime is 818781366539. The reversal of 818781366479 is 974663187818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818781366479 - 2³² = 814486399183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818781360479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409390683239 + 409390683240.

It is an arithmetic number, because the mean of its divisors is an integer number (409390683240).

Almost surely, 2^818781366479 is an apocalyptic number.

818781366479 is a deficient number, since it is larger than the sum of its proper divisors (1).

818781366479 is an equidigital number, since it uses as much as digits as its factorization.

818781366479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97542144, while the sum is 68.

The spelling of 818781366479 in words is "eight hundred eighteen billion, seven hundred eighty-one million, three hundred sixty-six thousand, four hundred seventy-nine".