671086521812 has 24 divisors (see below), whose sum is σ = 1351180924800. Its totient is φ = 285678249120.

The previous prime is 671086521811. The next prime is 671086521817. The reversal of 671086521812 is 218125680176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671086521811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80423264 + ... + 80431607.

It is an arithmetic number, because the mean of its divisors is an integer number (56299205200).

Almost surely, 2^671086521812 is an apocalyptic number.

It is an amenable number.

671086521812 is an abundant number, since it is smaller than the sum of its proper divisors (680094402988).

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

671086521812 is a wasteful number, since it uses less digits than its factorization.

671086521812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160855031 (or 160855029 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 671086521812 in words is "six hundred seventy-one billion, eighty-six million, five hundred twenty-one thousand, eight hundred twelve".