818981411449 has 2 divisors, whose sum is σ = 818981411450. Its totient is φ = 818981411448.

The previous prime is 818981411351. The next prime is 818981411453. The reversal of 818981411449 is 944114189818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569825697424 + 249155714025 = 754868^2 + 499155^2 .

It is a cyclic number.

It is not a de Polignac number, because 818981411449 - 2¹¹ = 818981409401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 818981411393 and 818981411402.

It is not a weakly prime, because it can be changed into another prime (818981412449) 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, 409490705724 + 409490705725.

It is an arithmetic number, because the mean of its divisors is an integer number (409490705725).

Almost surely, 2^818981411449 is an apocalyptic number.

It is an amenable number.

818981411449 is a deficient number, since it is larger than the sum of its proper divisors (1).

818981411449 is an equidigital number, since it uses as much as digits as its factorization.

818981411449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2654208, while the sum is 58.

The spelling of 818981411449 in words is "eight hundred eighteen billion, nine hundred eighty-one million, four hundred eleven thousand, four hundred forty-nine".