18786160928609 has 2 divisors, whose sum is σ = 18786160928610. Its totient is φ = 18786160928608.

The previous prime is 18786160928573. The next prime is 18786160928611. The reversal of 18786160928609 is 90682906168781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15533278147984 + 3252882780625 = 3941228^2 + 1803575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18786160928609 is a prime.

Together with 18786160928611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18786160978609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9393080464304 + 9393080464305.

It is an arithmetic number, because the mean of its divisors is an integer number (9393080464305).

Almost surely, 2^{18786160928609} is an apocalyptic number.

It is an amenable number.

18786160928609 is a deficient number, since it is larger than the sum of its proper divisors (1).

18786160928609 is an equidigital number, since it uses as much as digits as its factorization.

18786160928609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125411328, while the sum is 71.

The spelling of 18786160928609 in words is "eighteen trillion, seven hundred eighty-six billion, one hundred sixty million, nine hundred twenty-eight thousand, six hundred nine".