671345211872 has 48 divisors (see below), whose sum is σ = 1399546248912. Its totient is φ = 315907368960.

The previous prime is 671345211857. The next prime is 671345211941. The reversal of 671345211872 is 278112543176.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12229478 + ... + 12284250.

It is an arithmetic number, because the mean of its divisors is an integer number (29157213519).

Almost surely, 2^671345211872 is an apocalyptic number.

It is an amenable number.

671345211872 is an abundant number, since it is smaller than the sum of its proper divisors (728201037040).

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

671345211872 is a wasteful number, since it uses less digits than its factorization.

671345211872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77331 (or 77323 counting only the distinct ones).

The product of its digits is 564480, while the sum is 47.

It can be divided in two parts, 671 and 345211872, that added together give a palindrome (345212543).

The spelling of 671345211872 in words is "six hundred seventy-one billion, three hundred forty-five million, two hundred eleven thousand, eight hundred seventy-two".