671287013172 has 72 divisors (see below), whose sum is σ = 1706207473152. Its totient is φ = 222530918400.

The previous prime is 671287013161. The next prime is 671287013179. The reversal of 671287013172 is 271310782176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671287013179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30800463 + ... + 30822249.

It is an arithmetic number, because the mean of its divisors is an integer number (23697326016).

Almost surely, 2^671287013172 is an apocalyptic number.

It is an amenable number.

671287013172 is an abundant number, since it is smaller than the sum of its proper divisors (1034920459980).

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

671287013172 is a wasteful number, since it uses less digits than its factorization.

671287013172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26469 (or 26464 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 671287013172 in words is "six hundred seventy-one billion, two hundred eighty-seven million, thirteen thousand, one hundred seventy-two".