681871832 has 16 divisors (see below), whose sum is σ = 1289825640. Its totient is φ = 337918336.

The previous prime is 681871811. The next prime is 681871843. The reversal of 681871832 is 238178186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376238 + ... + 378045.

Almost surely, 2^681871832 is an apocalyptic number.

It is an amenable number.

681871832 is a deficient number, since it is larger than the sum of its proper divisors (607953808).

681871832 is a wasteful number, since it uses less digits than its factorization.

681871832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754402 (or 754398 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 681871832 is about 26112.6756959144. The cubic root of 681871832 is about 880.1720703466.

The spelling of 681871832 in words is "six hundred eighty-one million, eight hundred seventy-one thousand, eight hundred thirty-two".