18775712489 has 2 divisors, whose sum is σ = 18775712490. Its totient is φ = 18775712488.

The previous prime is 18775712413. The next prime is 18775712503. The reversal of 18775712489 is 98421757781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18405534889 + 370177600 = 135667^2 + 19240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18775712489 is a prime.

It is not a weakly prime, because it can be changed into another prime (18775712089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9387856244 + 9387856245.

It is an arithmetic number, because the mean of its divisors is an integer number (9387856245).

Almost surely, 2^18775712489 is an apocalyptic number.

It is an amenable number.

18775712489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18775712489 is an equidigital number, since it uses as much as digits as its factorization.

18775712489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 59.

The spelling of 18775712489 in words is "eighteen billion, seven hundred seventy-five million, seven hundred twelve thousand, four hundred eighty-nine".