681471857112 has 64 divisors (see below), whose sum is σ = 1793439792000. Its totient is φ = 215190503424.

The previous prime is 681471856981. The next prime is 681471857167. The reversal of 681471857112 is 211758174186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17257663 + ... + 17297105.

It is an arithmetic number, because the mean of its divisors is an integer number (28022496750).

Almost surely, 2^681471857112 is an apocalyptic number.

It is an amenable number.

681471857112 is an abundant number, since it is smaller than the sum of its proper divisors (1111967934888).

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

681471857112 is a wasteful number, since it uses less digits than its factorization.

681471857112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77360 (or 77356 counting only the distinct ones).

The product of its digits is 752640, while the sum is 51.

The spelling of 681471857112 in words is "six hundred eighty-one billion, four hundred seventy-one million, eight hundred fifty-seven thousand, one hundred twelve".