18548017592497 has 2 divisors, whose sum is σ = 18548017592498. Its totient is φ = 18548017592496.

The previous prime is 18548017592449. The next prime is 18548017592597. The reversal of 18548017592497 is 79429571084581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10753736345521 + 7794281246976 = 3279289^2 + 2791824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18548017592497 is a prime.

It is a super-2 number, since 2×18548017592497² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18548017592597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274008796248 + 9274008796249.

It is an arithmetic number, because the mean of its divisors is an integer number (9274008796249).

Almost surely, 2^{18548017592497} is an apocalyptic number.

It is an amenable number.

18548017592497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18548017592497 is an equidigital number, since it uses as much as digits as its factorization.

18548017592497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 203212800, while the sum is 70.

The spelling of 18548017592497 in words is "eighteen trillion, five hundred forty-eight billion, seventeen million, five hundred ninety-two thousand, four hundred ninety-seven".