671846779612 has 6 divisors (see below), whose sum is σ = 1175731864328. Its totient is φ = 335923389804.

The previous prime is 671846779589. The next prime is 671846779631. The reversal of 671846779612 is 216977648176.

It is a congruent number.

It is an unprimeable number.

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, 83980847448 + ... + 83980847455.

Almost surely, 2^671846779612 is an apocalyptic number.

It is an amenable number.

671846779612 is a deficient number, since it is larger than the sum of its proper divisors (503885084716).

671846779612 is a wasteful number, since it uses less digits than its factorization.

671846779612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167961694907 (or 167961694905 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 64.

The spelling of 671846779612 in words is "six hundred seventy-one billion, eight hundred forty-six million, seven hundred seventy-nine thousand, six hundred twelve".