671355878316 has 96 divisors (see below), whose sum is σ = 1684125757440. Its totient is φ = 207745171200.

The previous prime is 671355878251. The next prime is 671355878317. The reversal of 671355878316 is 613878553176.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 671355878316.

It is not an unprimeable number, because it can be changed into a prime (671355878317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633750 + ... + 1320738.

It is an arithmetic number, because the mean of its divisors is an integer number (17542976640).

Almost surely, 2^671355878316 is an apocalyptic number.

It is an amenable number.

671355878316 is an abundant number, since it is smaller than the sum of its proper divisors (1012769879124).

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

671355878316 is a wasteful number, since it uses less digits than its factorization.

671355878316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687135 (or 687133 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 60.

The spelling of 671355878316 in words is "six hundred seventy-one billion, three hundred fifty-five million, eight hundred seventy-eight thousand, three hundred sixteen".