1838339386187 has 2 divisors, whose sum is σ = 1838339386188. Its totient is φ = 1838339386186.

The previous prime is 1838339386183. The next prime is 1838339386267. The reversal of 1838339386187 is 7816839338381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1838339386187 - 2² = 1838339386183 is a prime.

It is not a weakly prime, because it can be changed into another prime (1838339386183) 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, 919169693093 + 919169693094.

It is an arithmetic number, because the mean of its divisors is an integer number (919169693094).

Almost surely, 2^{1838339386187} is an apocalyptic number.

1838339386187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838339386187 is an equidigital number, since it uses as much as digits as its factorization.

1838339386187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125411328, while the sum is 68.

The spelling of 1838339386187 in words is "one trillion, eight hundred thirty-eight billion, three hundred thirty-nine million, three hundred eighty-six thousand, one hundred eighty-seven".