181983424573 has 2 divisors, whose sum is σ = 181983424574. Its totient is φ = 181983424572.

The previous prime is 181983424549. The next prime is 181983424603. The reversal of 181983424573 is 375424389181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164229994009 + 17753430564 = 405253^2 + 133242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181983424573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181983424523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90991712286 + 90991712287.

It is an arithmetic number, because the mean of its divisors is an integer number (90991712287).

Almost surely, 2^181983424573 is an apocalyptic number.

It is an amenable number.

181983424573 is a deficient number, since it is larger than the sum of its proper divisors (1).

181983424573 is an equidigital number, since it uses as much as digits as its factorization.

181983424573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The spelling of 181983424573 in words is "one hundred eighty-one billion, nine hundred eighty-three million, four hundred twenty-four thousand, five hundred seventy-three".