181845360089 has 2 divisors, whose sum is σ = 181845360090. Its totient is φ = 181845360088.

The previous prime is 181845360049. The next prime is 181845360091. The reversal of 181845360089 is 980063548181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180319129600 + 1526230489 = 424640^2 + 39067^2 .

It is a cyclic number.

It is not a de Polignac number, because 181845360089 - 2⁸ = 181845359833 is a prime.

Together with 181845360091, 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 181845360089.

It is not a weakly prime, because it can be changed into another prime (181845360029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90922680044 + 90922680045.

It is an arithmetic number, because the mean of its divisors is an integer number (90922680045).

Almost surely, 2^181845360089 is an apocalyptic number.

It is an amenable number.

181845360089 is a deficient number, since it is larger than the sum of its proper divisors (1).

181845360089 is an equidigital number, since it uses as much as digits as its factorization.

181845360089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 181845360089 in words is "one hundred eighty-one billion, eight hundred forty-five million, three hundred sixty thousand, eighty-nine".