181030223023189 has 2 divisors, whose sum is σ = 181030223023190. Its totient is φ = 181030223023188.

The previous prime is 181030223023183. The next prime is 181030223023261. The reversal of 181030223023189 is 981320322030181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110657418700689 + 70372804322500 = 10519383^2 + 8388850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181030223023189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181030223023183) 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, 90515111511594 + 90515111511595.

It is an arithmetic number, because the mean of its divisors is an integer number (90515111511595).

Almost surely, 2^{181030223023189} is an apocalyptic number.

It is an amenable number.

181030223023189 is a deficient number, since it is larger than the sum of its proper divisors (1).

181030223023189 is an equidigital number, since it uses as much as digits as its factorization.

181030223023189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 181030223023189 in words is "one hundred eighty-one trillion, thirty billion, two hundred twenty-three million, twenty-three thousand, one hundred eighty-nine".