671622216856 has 16 divisors (see below), whose sum is σ = 1259329352400. Its totient is φ = 335801056224.

The previous prime is 671622216817. The next prime is 671622216857. The reversal of 671622216856 is 658612226176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671622216857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968691 + ... + 1510498.

It is an arithmetic number, because the mean of its divisors is an integer number (78708084525).

Almost surely, 2^671622216856 is an apocalyptic number.

It is an amenable number.

671622216856 is a deficient number, since it is larger than the sum of its proper divisors (587707135544).

671622216856 is a wasteful number, since it uses less digits than its factorization.

671622216856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513058 (or 2513054 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The spelling of 671622216856 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, eight hundred fifty-six".