3818121466399 has 2 divisors, whose sum is σ = 3818121466400. Its totient is φ = 3818121466398.

The previous prime is 3818121466373. The next prime is 3818121466441. The reversal of 3818121466399 is 9936641218183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3818121466399 - 2¹¹ = 3818121464351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3818121466199) 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, 1909060733199 + 1909060733200.

It is an arithmetic number, because the mean of its divisors is an integer number (1909060733200).

Almost surely, 2^{3818121466399} is an apocalyptic number.

3818121466399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3818121466399 is an equidigital number, since it uses as much as digits as its factorization.

3818121466399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13436928, while the sum is 61.

The spelling of 3818121466399 in words is "three trillion, eight hundred eighteen billion, one hundred twenty-one million, four hundred sixty-six thousand, three hundred ninety-nine".