181845360049 has 2 divisors, whose sum is σ = 181845360050. Its totient is φ = 181845360048.

The previous prime is 181845360029. The next prime is 181845360089. The reversal of 181845360049 is 940063548181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122477601024 + 59367759025 = 349968^2 + 243655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181845360049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181845359984 and 181845360011.

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

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90922680024 + 90922680025.

It is an arithmetic number, because the mean of its divisors is an integer number (90922680025).

Almost surely, 2^181845360049 is an apocalyptic number.

It is an amenable number.

181845360049 is a deficient number, since it is larger than the sum of its proper divisors (1).

181845360049 is an equidigital number, since it uses as much as digits as its factorization.

181845360049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 181845360049 in words is "one hundred eighty-one billion, eight hundred forty-five million, three hundred sixty thousand, forty-nine".