1766964549221 has 2 divisors, whose sum is σ = 1766964549222. Its totient is φ = 1766964549220.

The previous prime is 1766964549187. The next prime is 1766964549241. The reversal of 1766964549221 is 1229454696671.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184244532900 + 582720016321 = 1088230^2 + 763361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1766964549221 - 2³⁴ = 1749784680037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1766964549241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883482274610 + 883482274611.

It is an arithmetic number, because the mean of its divisors is an integer number (883482274611).

Almost surely, 2^{1766964549221} is an apocalyptic number.

It is an amenable number.

1766964549221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1766964549221 is an equidigital number, since it uses as much as digits as its factorization.

1766964549221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 62.

The spelling of 1766964549221 in words is "one trillion, seven hundred sixty-six billion, nine hundred sixty-four million, five hundred forty-nine thousand, two hundred twenty-one".