18648081795097 has 2 divisors, whose sum is σ = 18648081795098. Its totient is φ = 18648081795096.

The previous prime is 18648081795019. The next prime is 18648081795127. The reversal of 18648081795097 is 79059718084681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10513812735001 + 8134269060096 = 3242501^2 + 2852064^2 .

It is a cyclic number.

It is not a de Polignac number, because 18648081795097 - 2¹¹ = 18648081793049 is a prime.

It is not a weakly prime, because it can be changed into another prime (18648081795797) 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, 9324040897548 + 9324040897549.

It is an arithmetic number, because the mean of its divisors is an integer number (9324040897549).

Almost surely, 2^{18648081795097} is an apocalyptic number.

It is an amenable number.

18648081795097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18648081795097 is an equidigital number, since it uses as much as digits as its factorization.

18648081795097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243855360, while the sum is 73.

The spelling of 18648081795097 in words is "eighteen trillion, six hundred forty-eight billion, eighty-one million, seven hundred ninety-five thousand, ninety-seven".