818603324281 has 2 divisors, whose sum is σ = 818603324282. Its totient is φ = 818603324280.

The previous prime is 818603324267. The next prime is 818603324303. The reversal of 818603324281 is 182423306818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431116994025 + 387486330256 = 656595^2 + 622484^2 .

It is a cyclic number.

It is not a de Polignac number, because 818603324281 - 2⁵ = 818603324249 is a prime.

It is a super-2 number, since 2×818603324281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (818603324261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409301662140 + 409301662141.

It is an arithmetic number, because the mean of its divisors is an integer number (409301662141).

Almost surely, 2^818603324281 is an apocalyptic number.

It is an amenable number.

818603324281 is a deficient number, since it is larger than the sum of its proper divisors (1).

818603324281 is an equidigital number, since it uses as much as digits as its factorization.

818603324281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 818603324281 in words is "eight hundred eighteen billion, six hundred three million, three hundred twenty-four thousand, two hundred eighty-one".