818852742089 has 2 divisors, whose sum is σ = 818852742090. Its totient is φ = 818852742088.

The previous prime is 818852742047. The next prime is 818852742101. The reversal of 818852742089 is 980247258818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521291220025 + 297561522064 = 722005^2 + 545492^2 .

It is a cyclic number.

It is not a de Polignac number, because 818852742089 - 2²⁸ = 818584306633 is a prime.

It is not a weakly prime, because it can be changed into another prime (818852702089) 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, 409426371044 + 409426371045.

It is an arithmetic number, because the mean of its divisors is an integer number (409426371045).

Almost surely, 2^818852742089 is an apocalyptic number.

It is an amenable number.

818852742089 is a deficient number, since it is larger than the sum of its proper divisors (1).

818852742089 is an equidigital number, since it uses as much as digits as its factorization.

818852742089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20643840, while the sum is 62.

The spelling of 818852742089 in words is "eight hundred eighteen billion, eight hundred fifty-two million, seven hundred forty-two thousand, eighty-nine".