681837672 has 16 divisors (see below), whose sum is σ = 1704594240. Its totient is φ = 227279216.

The previous prime is 681837661. The next prime is 681837701. The reversal of 681837672 is 276738186.

It is a super-2 number, since 2×681837672² = 929805221916759168, which contains 22 as substring.

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, 14204928 + ... + 14204975.

It is an arithmetic number, because the mean of its divisors is an integer number (106537140).

Almost surely, 2^681837672 is an apocalyptic number.

It is an amenable number.

681837672 is an abundant number, since it is smaller than the sum of its proper divisors (1022756568).

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

681837672 is a wasteful number, since it uses less digits than its factorization.

681837672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28409912 (or 28409908 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 681837672 is about 26112.0215992558. The cubic root of 681837672 is about 880.1573719929.

It can be divided in two parts, 68183 and 7672, that added together give a triangular number (75855 = T₃₈₉).

The spelling of 681837672 in words is "six hundred eighty-one million, eight hundred thirty-seven thousand, six hundred seventy-two".