1818055619 has 2 divisors, whose sum is σ = 1818055620. Its totient is φ = 1818055618.

The previous prime is 1818055571. The next prime is 1818055621. The reversal of 1818055619 is 9165508181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1818055619 - 2¹² = 1818051523 is a prime.

It is a super-2 number, since 2×1818055619² = 6610652467554946322, which contains 22 as substring.

Together with 1818055621, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1818055619.

It is not a weakly prime, because it can be changed into another prime (1818055919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909027809 + 909027810.

It is an arithmetic number, because the mean of its divisors is an integer number (909027810).

Almost surely, 2^1818055619 is an apocalyptic number.

1818055619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818055619 is an equidigital number, since it uses as much as digits as its factorization.

1818055619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 44.

The square root of 1818055619 is about 42638.6634288647. The cubic root of 1818055619 is about 1220.4942051790.

The spelling of 1818055619 in words is "one billion, eight hundred eighteen million, fifty-five thousand, six hundred nineteen".