673826105569 has 2 divisors, whose sum is σ = 673826105570. Its totient is φ = 673826105568.

The previous prime is 673826105543. The next prime is 673826105591. The reversal of 673826105569 is 965501628376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350065105569 + 323761000000 = 591663^2 + 569000^2 .

It is a cyclic number.

It is not a de Polignac number, because 673826105569 - 2²³ = 673817716961 is a prime.

It is a super-2 number, since 2×673826105569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (673826102569) 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, 336913052784 + 336913052785.

It is an arithmetic number, because the mean of its divisors is an integer number (336913052785).

Almost surely, 2^673826105569 is an apocalyptic number.

It is an amenable number.

673826105569 is a deficient number, since it is larger than the sum of its proper divisors (1).

673826105569 is an equidigital number, since it uses as much as digits as its factorization.

673826105569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 673826105569 in words is "six hundred seventy-three billion, eight hundred twenty-six million, one hundred five thousand, five hundred sixty-nine".