671448919686 has 8 divisors (see below), whose sum is σ = 1342897839384. Its totient is φ = 223816306560.

The previous prime is 671448919651. The next prime is 671448919717. The reversal of 671448919686 is 686919844176.

It is a sphenic number, since it is the product of 3 distinct primes.

671448919686 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 671448919686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55954076635 + ... + 55954076646.

It is an arithmetic number, because the mean of its divisors is an integer number (167862229923).

Almost surely, 2^671448919686 is an apocalyptic number.

671448919686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671448919686 is a wasteful number, since it uses less digits than its factorization.

671448919686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111908153286.

The product of its digits is 125411328, while the sum is 69.

The spelling of 671448919686 in words is "six hundred seventy-one billion, four hundred forty-eight million, nine hundred nineteen thousand, six hundred eighty-six".