671315215768 has 64 divisors (see below), whose sum is σ = 1300584146400. Its totient is φ = 324641095680.

The previous prime is 671315215717. The next prime is 671315215789. The reversal of 671315215768 is 867512513176.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34546071 + ... + 34565497.

Almost surely, 2^671315215768 is an apocalyptic number.

It is an amenable number.

671315215768 is a deficient number, since it is larger than the sum of its proper divisors (629268930632).

671315215768 is a wasteful number, since it uses less digits than its factorization.

671315215768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20380 (or 20376 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 52.

The spelling of 671315215768 in words is "six hundred seventy-one billion, three hundred fifteen million, two hundred fifteen thousand, seven hundred sixty-eight".