671307181656961 has 16 divisors (see below), whose sum is σ = 695933973504000. Its totient is φ = 646867691730000.

The previous prime is 671307181656949. The next prime is 671307181657001. The reversal of 671307181656961 is 169656181703176.

It is a cyclic number.

It is not a de Polignac number, because 671307181656961 - 2⁴⁷ = 530569693301633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671307181656931) 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 in 15 ways as a sum of consecutive naturals, for example, 12593560 + ... + 38745478.

It is an arithmetic number, because the mean of its divisors is an integer number (43495873344000).

Almost surely, 2^{671307181656961} is an apocalyptic number.

It is an amenable number.

671307181656961 is a deficient number, since it is larger than the sum of its proper divisors (24626791847039).

671307181656961 is a wasteful number, since it uses less digits than its factorization.

671307181656961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26155500.

The product of its (nonzero) digits is 68584320, while the sum is 67.

The spelling of 671307181656961 in words is "six hundred seventy-one trillion, three hundred seven billion, one hundred eighty-one million, six hundred fifty-six thousand, nine hundred sixty-one".