18065715888401 has 2 divisors, whose sum is σ = 18065715888402. Its totient is φ = 18065715888400.

The previous prime is 18065715888397. The next prime is 18065715888413. The reversal of 18065715888401 is 10488851756081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17141454770176 + 924261118225 = 4140224^2 + 961385^2 .

It is a cyclic number.

It is not a de Polignac number, because 18065715888401 - 2² = 18065715888397 is a prime.

It is not a weakly prime, because it can be changed into another prime (18065715888901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032857944200 + 9032857944201.

It is an arithmetic number, because the mean of its divisors is an integer number (9032857944201).

Almost surely, 2^{18065715888401} is an apocalyptic number.

It is an amenable number.

18065715888401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18065715888401 is an equidigital number, since it uses as much as digits as its factorization.

18065715888401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17203200, while the sum is 62.

The spelling of 18065715888401 in words is "eighteen trillion, sixty-five billion, seven hundred fifteen million, eight hundred eighty-eight thousand, four hundred one".