2166323241493 has 2 divisors, whose sum is σ = 2166323241494. Its totient is φ = 2166323241492.

The previous prime is 2166323241473. The next prime is 2166323241541. The reversal of 2166323241493 is 3941423236612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2039118312529 + 127204928964 = 1427977^2 + 356658^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166323241493 - 2²⁵ = 2166289687061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166323241413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083161620746 + 1083161620747.

It is an arithmetic number, because the mean of its divisors is an integer number (1083161620747).

Almost surely, 2^{2166323241493} is an apocalyptic number.

It is an amenable number.

2166323241493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166323241493 is an equidigital number, since it uses as much as digits as its factorization.

2166323241493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 46.

The spelling of 2166323241493 in words is "two trillion, one hundred sixty-six billion, three hundred twenty-three million, two hundred forty-one thousand, four hundred ninety-three".