1538418416243 has 2 divisors, whose sum is σ = 1538418416244. Its totient is φ = 1538418416242.

The previous prime is 1538418416239. The next prime is 1538418416351. The reversal of 1538418416243 is 3426148148351.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3426148148351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1538418416243 - 2² = 1538418416239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1538418416191 and 1538418416200.

It is not a weakly prime, because it can be changed into another prime (1538418419243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769209208121 + 769209208122.

It is an arithmetic number, because the mean of its divisors is an integer number (769209208122).

Almost surely, 2^{1538418416243} is an apocalyptic number.

1538418416243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538418416243 is an equidigital number, since it uses as much as digits as its factorization.

1538418416243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 50.

The spelling of 1538418416243 in words is "one trillion, five hundred thirty-eight billion, four hundred eighteen million, four hundred sixteen thousand, two hundred forty-three".