671830347161 has 2 divisors, whose sum is σ = 671830347162. Its totient is φ = 671830347160.

The previous prime is 671830347151. The next prime is 671830347197. The reversal of 671830347161 is 161743038176.

671830347161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544769467225 + 127060879936 = 738085^2 + 356456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671830347161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (671830347101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335915173580 + 335915173581.

It is an arithmetic number, because the mean of its divisors is an integer number (335915173581).

Almost surely, 2^671830347161 is an apocalyptic number.

It is an amenable number.

671830347161 is a deficient number, since it is larger than the sum of its proper divisors (1).

671830347161 is an equidigital number, since it uses as much as digits as its factorization.

671830347161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 671830347161 in words is "six hundred seventy-one billion, eight hundred thirty million, three hundred forty-seven thousand, one hundred sixty-one".