18571193348497 has 2 divisors, whose sum is σ = 18571193348498. Its totient is φ = 18571193348496.

The previous prime is 18571193348471. The next prime is 18571193348503. The reversal of 18571193348497 is 79484339117581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14893393766416 + 3677799582081 = 3859196^2 + 1917759^2 .

It is a cyclic number.

It is not a de Polignac number, because 18571193348497 - 2¹¹ = 18571193346449 is a prime.

It is not a weakly prime, because it can be changed into another prime (18571193348597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9285596674248 + 9285596674249.

It is an arithmetic number, because the mean of its divisors is an integer number (9285596674249).

Almost surely, 2^{18571193348497} is an apocalyptic number.

It is an amenable number.

18571193348497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18571193348497 is an equidigital number, since it uses as much as digits as its factorization.

18571193348497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 70.

The spelling of 18571193348497 in words is "eighteen trillion, five hundred seventy-one billion, one hundred ninety-three million, three hundred forty-eight thousand, four hundred ninety-seven".