18775116677 has 2 divisors, whose sum is σ = 18775116678. Its totient is φ = 18775116676.

The previous prime is 18775116653. The next prime is 18775116691. The reversal of 18775116677 is 77661157781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13667012836 + 5108103841 = 116906^2 + 71471^2 .

It is an emirp because it is prime and its reverse (77661157781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18775116677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18775116377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9387558338 + 9387558339.

It is an arithmetic number, because the mean of its divisors is an integer number (9387558339).

Almost surely, 2^18775116677 is an apocalyptic number.

It is an amenable number.

18775116677 is a deficient number, since it is larger than the sum of its proper divisors (1).

18775116677 is an equidigital number, since it uses as much as digits as its factorization.

18775116677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3457440, while the sum is 56.

The spelling of 18775116677 in words is "eighteen billion, seven hundred seventy-five million, one hundred sixteen thousand, six hundred seventy-seven".