671744652008 has 16 divisors (see below), whose sum is σ = 1259533618980. Its totient is φ = 335869020288.

The previous prime is 671744651989. The next prime is 671744652077. The reversal of 671744652008 is 800256447176.

It can be written as a sum of positive squares in 2 ways, for example, as 664978273444 + 6766378564 = 815462^2 + 82258^2 .

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, 595166 + ... + 1302962.

Almost surely, 2^671744652008 is an apocalyptic number.

It is an amenable number.

671744652008 is a deficient number, since it is larger than the sum of its proper divisors (587788966972).

671744652008 is a wasteful number, since it uses less digits than its factorization.

671744652008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826436 (or 826432 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 671744652008 in words is "six hundred seventy-one billion, seven hundred forty-four million, six hundred fifty-two thousand, eight".