1766391683449 has 2 divisors, whose sum is σ = 1766391683450. Its totient is φ = 1766391683448.

The previous prime is 1766391683423. The next prime is 1766391683471. The reversal of 1766391683449 is 9443861936671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936069795049 + 830321888400 = 967507^2 + 911220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1766391683449 - 2⁷ = 1766391683321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1766391683149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883195841724 + 883195841725.

It is an arithmetic number, because the mean of its divisors is an integer number (883195841725).

Almost surely, 2^{1766391683449} is an apocalyptic number.

It is an amenable number.

1766391683449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1766391683449 is an equidigital number, since it uses as much as digits as its factorization.

1766391683449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 67.

The spelling of 1766391683449 in words is "one trillion, seven hundred sixty-six billion, three hundred ninety-one million, six hundred eighty-three thousand, four hundred forty-nine".