18345485177 has 2 divisors, whose sum is σ = 18345485178. Its totient is φ = 18345485176.

The previous prime is 18345485159. The next prime is 18345485201. The reversal of 18345485177 is 77158454381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18327473641 + 18011536 = 135379^2 + 4244^2 .

It is a cyclic number.

It is not a de Polignac number, because 18345485177 - 2⁸ = 18345484921 is a prime.

It is not a weakly prime, because it can be changed into another prime (18345481177) 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, 9172742588 + 9172742589.

It is an arithmetic number, because the mean of its divisors is an integer number (9172742589).

Almost surely, 2^18345485177 is an apocalyptic number.

It is an amenable number.

18345485177 is a deficient number, since it is larger than the sum of its proper divisors (1).

18345485177 is an equidigital number, since it uses as much as digits as its factorization.

18345485177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3763200, while the sum is 53.

The spelling of 18345485177 in words is "eighteen billion, three hundred forty-five million, four hundred eighty-five thousand, one hundred seventy-seven".