18457113617 has 2 divisors, whose sum is σ = 18457113618. Its totient is φ = 18457113616.

The previous prime is 18457113527. The next prime is 18457113641. The reversal of 18457113617 is 71631175481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16661388241 + 1795725376 = 129079^2 + 42376^2 .

It is a cyclic number.

It is not a de Polignac number, because 18457113617 - 2¹⁰ = 18457112593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18457113667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9228556808 + 9228556809.

It is an arithmetic number, because the mean of its divisors is an integer number (9228556809).

Almost surely, 2^18457113617 is an apocalyptic number.

It is an amenable number.

18457113617 is a deficient number, since it is larger than the sum of its proper divisors (1).

18457113617 is an equidigital number, since it uses as much as digits as its factorization.

18457113617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 44.

The spelling of 18457113617 in words is "eighteen billion, four hundred fifty-seven million, one hundred thirteen thousand, six hundred seventeen".