671564476741 has 2 divisors, whose sum is σ = 671564476742. Its totient is φ = 671564476740.

The previous prime is 671564476717. The next prime is 671564476819. The reversal of 671564476741 is 147674465176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367830120100 + 303734356641 = 606490^2 + 551121^2 .

It is a cyclic number.

It is not a de Polignac number, because 671564476741 - 2³³ = 662974542149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671564471741) 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, 335782238370 + 335782238371.

It is an arithmetic number, because the mean of its divisors is an integer number (335782238371).

Almost surely, 2^671564476741 is an apocalyptic number.

It is an amenable number.

671564476741 is a deficient number, since it is larger than the sum of its proper divisors (1).

671564476741 is an equidigital number, since it uses as much as digits as its factorization.

671564476741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 58.

The spelling of 671564476741 in words is "six hundred seventy-one billion, five hundred sixty-four million, four hundred seventy-six thousand, seven hundred forty-one".