8189666744893 has 2 divisors, whose sum is σ = 8189666744894. Its totient is φ = 8189666744892.

The previous prime is 8189666744881. The next prime is 8189666744899. The reversal of 8189666744893 is 3984476669818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7902159522084 + 287507222809 = 2811078^2 + 536197^2 .

It is a cyclic number.

It is not a de Polignac number, because 8189666744893 - 2¹³ = 8189666736701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8189666744899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094833372446 + 4094833372447.

It is an arithmetic number, because the mean of its divisors is an integer number (4094833372447).

Almost surely, 2^{8189666744893} is an apocalyptic number.

It is an amenable number.

8189666744893 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189666744893 is an equidigital number, since it uses as much as digits as its factorization.

8189666744893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3009871872, while the sum is 79.

The spelling of 8189666744893 in words is "eight trillion, one hundred eighty-nine billion, six hundred sixty-six million, seven hundred forty-four thousand, eight hundred ninety-three".