18165741436049 has 2 divisors, whose sum is σ = 18165741436050. Its totient is φ = 18165741436048.

The previous prime is 18165741436001. The next prime is 18165741436153. The reversal of 18165741436049 is 94063414756181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10805236785424 + 7360504650625 = 3287132^2 + 2713025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18165741436049 is a prime.

It is not a weakly prime, because it can be changed into another prime (18165741436649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9082870718024 + 9082870718025.

It is an arithmetic number, because the mean of its divisors is an integer number (9082870718025).

Almost surely, 2^{18165741436049} is an apocalyptic number.

It is an amenable number.

18165741436049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18165741436049 is an equidigital number, since it uses as much as digits as its factorization.

18165741436049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 18165741436049 in words is "eighteen trillion, one hundred sixty-five billion, seven hundred forty-one million, four hundred thirty-six thousand, forty-nine".