18028765312769 has 2 divisors, whose sum is σ = 18028765312770. Its totient is φ = 18028765312768.

The previous prime is 18028765312763. The next prime is 18028765312847. The reversal of 18028765312769 is 96721356782081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17415264385600 + 613500927169 = 4173160^2 + 783263^2 .

It is a cyclic number.

It is not a de Polignac number, because 18028765312769 - 2⁴⁴ = 436579268353 is a prime.

It is a super-2 number, since 2×18028765312769² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18028765312763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9014382656384 + 9014382656385.

It is an arithmetic number, because the mean of its divisors is an integer number (9014382656385).

Almost surely, 2^{18028765312769} is an apocalyptic number.

It is an amenable number.

18028765312769 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028765312769 is an equidigital number, since it uses as much as digits as its factorization.

18028765312769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 18028765312769 in words is "eighteen trillion, twenty-eight billion, seven hundred sixty-five million, three hundred twelve thousand, seven hundred sixty-nine".