671113552609 has 2 divisors, whose sum is σ = 671113552610. Its totient is φ = 671113552608.

The previous prime is 671113552567. The next prime is 671113552679. The reversal of 671113552609 is 906255311176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669754008225 + 1359544384 = 818385^2 + 36872^2 .

It is a cyclic number.

It is not a de Polignac number, because 671113552609 - 2⁹ = 671113552097 is a prime.

It is not a weakly prime, because it can be changed into another prime (671113552679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335556776304 + 335556776305.

It is an arithmetic number, because the mean of its divisors is an integer number (335556776305).

Almost surely, 2^671113552609 is an apocalyptic number.

It is an amenable number.

671113552609 is a deficient number, since it is larger than the sum of its proper divisors (1).

671113552609 is an equidigital number, since it uses as much as digits as its factorization.

671113552609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 671113552609 in words is "six hundred seventy-one billion, one hundred thirteen million, five hundred fifty-two thousand, six hundred nine".