18065641436573 has 2 divisors, whose sum is σ = 18065641436574. Its totient is φ = 18065641436572.

The previous prime is 18065641436509. The next prime is 18065641436581. The reversal of 18065641436573 is 37563414656081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15684752318404 + 2380889118169 = 3960398^2 + 1543013^2 .

It is an emirp because it is prime and its reverse (37563414656081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18065641436573 - 2⁶ = 18065641436509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18065641436173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032820718286 + 9032820718287.

It is an arithmetic number, because the mean of its divisors is an integer number (9032820718287).

Almost surely, 2^{18065641436573} is an apocalyptic number.

It is an amenable number.

18065641436573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18065641436573 is an equidigital number, since it uses as much as digits as its factorization.

18065641436573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43545600, while the sum is 59.

The spelling of 18065641436573 in words is "eighteen trillion, sixty-five billion, six hundred forty-one million, four hundred thirty-six thousand, five hundred seventy-three".