18589480648729 has 2 divisors, whose sum is σ = 18589480648730. Its totient is φ = 18589480648728.

The previous prime is 18589480648667. The next prime is 18589480648733. The reversal of 18589480648729 is 92784608498581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18589480648704 + 25 = 4311552^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 18589480648729 - 2²¹ = 18589478551577 is a prime.

It is not a weakly prime, because it can be changed into another prime (18589480648429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9294740324364 + 9294740324365.

It is an arithmetic number, because the mean of its divisors is an integer number (9294740324365).

Almost surely, 2^{18589480648729} is an apocalyptic number.

It is an amenable number.

18589480648729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18589480648729 is an equidigital number, since it uses as much as digits as its factorization.

18589480648729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2229534720, while the sum is 79.

The spelling of 18589480648729 in words is "eighteen trillion, five hundred eighty-nine billion, four hundred eighty million, six hundred forty-eight thousand, seven hundred twenty-nine".