818442476791 has 2 divisors, whose sum is σ = 818442476792. Its totient is φ = 818442476790.

The previous prime is 818442476771. The next prime is 818442476857. The reversal of 818442476791 is 197674244818.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818442476791 - 2⁹ = 818442476279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818442476741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409221238395 + 409221238396.

It is an arithmetic number, because the mean of its divisors is an integer number (409221238396).

Almost surely, 2^818442476791 is an apocalyptic number.

818442476791 is a deficient number, since it is larger than the sum of its proper divisors (1).

818442476791 is an equidigital number, since it uses as much as digits as its factorization.

818442476791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21676032, while the sum is 61.

The spelling of 818442476791 in words is "eight hundred eighteen billion, four hundred forty-two million, four hundred seventy-six thousand, seven hundred ninety-one".