671117355864 has 48 divisors (see below), whose sum is σ = 1819148778720. Its totient is φ = 223516336320.

The previous prime is 671117355859. The next prime is 671117355899. The reversal of 671117355864 is 468553711176.

671117355864 is a `hidden beast` number, since 6 + 7 + 1 + 11 + 73 + 558 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 671117355864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3861232 + ... + 4031295.

It is an arithmetic number, because the mean of its divisors is an integer number (37898932890).

Almost surely, 2^671117355864 is an apocalyptic number.

It is an amenable number.

671117355864 is an abundant number, since it is smaller than the sum of its proper divisors (1148031422856).

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

671117355864 is a wasteful number, since it uses less digits than its factorization.

671117355864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893720 (or 7893713 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 671117355864 in words is "six hundred seventy-one billion, one hundred seventeen million, three hundred fifty-five thousand, eight hundred sixty-four".