1831817888489 has 2 divisors, whose sum is σ = 1831817888490. Its totient is φ = 1831817888488.

The previous prime is 1831817888419. The next prime is 1831817888501. The reversal of 1831817888489 is 9848887181381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1714549310464 + 117268578025 = 1309408^2 + 342445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1831817888489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1831817888419) 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, 915908944244 + 915908944245.

It is an arithmetic number, because the mean of its divisors is an integer number (915908944245).

Almost surely, 2^{1831817888489} is an apocalyptic number.

It is an amenable number.

1831817888489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1831817888489 is an equidigital number, since it uses as much as digits as its factorization.

1831817888489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198180864, while the sum is 74.

The spelling of 1831817888489 in words is "one trillion, eight hundred thirty-one billion, eight hundred seventeen million, eight hundred eighty-eight thousand, four hundred eighty-nine".