818786545249 has 2 divisors, whose sum is σ = 818786545250. Its totient is φ = 818786545248.

The previous prime is 818786545141. The next prime is 818786545261. The reversal of 818786545249 is 942545687818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766775181649 + 52011363600 = 875657^2 + 228060^2 .

It is a cyclic number.

It is not a de Polignac number, because 818786545249 - 2⁷ = 818786545121 is a prime.

It is a super-2 number, since 2×818786545249² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (818786545279) 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, 409393272624 + 409393272625.

It is an arithmetic number, because the mean of its divisors is an integer number (409393272625).

Almost surely, 2^818786545249 is an apocalyptic number.

It is an amenable number.

818786545249 is a deficient number, since it is larger than the sum of its proper divisors (1).

818786545249 is an equidigital number, since it uses as much as digits as its factorization.

818786545249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154828800, while the sum is 67.

The spelling of 818786545249 in words is "eight hundred eighteen billion, seven hundred eighty-six million, five hundred forty-five thousand, two hundred forty-nine".