671205712120 has 16 divisors (see below), whose sum is σ = 1510212852360. Its totient is φ = 268482284832.

The previous prime is 671205712087. The next prime is 671205712129. The reversal of 671205712120 is 21217502176.

671205712120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671205712129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8390071362 + ... + 8390071441.

Almost surely, 2^671205712120 is an apocalyptic number.

It is an amenable number.

671205712120 is an abundant number, since it is smaller than the sum of its proper divisors (839007140240).

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

671205712120 is a wasteful number, since it uses less digits than its factorization.

671205712120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16780142814 (or 16780142810 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 671205712120 in words is "six hundred seventy-one billion, two hundred five million, seven hundred twelve thousand, one hundred twenty".