18489267193697 has 2 divisors, whose sum is σ = 18489267193698. Its totient is φ = 18489267193696.

The previous prime is 18489267193687. The next prime is 18489267193729. The reversal of 18489267193697 is 79639176298481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18403207690816 + 86059502881 = 4289896^2 + 293359^2 .

It is a cyclic number.

It is not a de Polignac number, because 18489267193697 - 2⁴ = 18489267193681 is a prime.

It is not a weakly prime, because it can be changed into another prime (18489267193687) 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, 9244633596848 + 9244633596849.

It is an arithmetic number, because the mean of its divisors is an integer number (9244633596849).

Almost surely, 2^{18489267193697} is an apocalyptic number.

It is an amenable number.

18489267193697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18489267193697 is an equidigital number, since it uses as much as digits as its factorization.

18489267193697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975228416, while the sum is 80.

The spelling of 18489267193697 in words is "eighteen trillion, four hundred eighty-nine billion, two hundred sixty-seven million, one hundred ninety-three thousand, six hundred ninety-seven".