1818198356159 has 2 divisors, whose sum is σ = 1818198356160. Its totient is φ = 1818198356158.

The previous prime is 1818198356147. The next prime is 1818198356257. The reversal of 1818198356159 is 9516538918181.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1818198356159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1818198356095 and 1818198356104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818194356159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909099178079 + 909099178080.

It is an arithmetic number, because the mean of its divisors is an integer number (909099178080).

Almost surely, 2^{1818198356159} is an apocalyptic number.

1818198356159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818198356159 is an equidigital number, since it uses as much as digits as its factorization.

1818198356159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 65.

The spelling of 1818198356159 in words is "one trillion, eight hundred eighteen billion, one hundred ninety-eight million, three hundred fifty-six thousand, one hundred fifty-nine".