681744096 has 72 divisors (see below), whose sum is σ = 2114965944. Its totient is φ = 206588160.

The previous prime is 681744079. The next prime is 681744101. The reversal of 681744096 is 690447186.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104431 + ... + 110766.

It is an arithmetic number, because the mean of its divisors is an integer number (29374527).

Almost surely, 2^681744096 is an apocalyptic number.

681744096 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

681744096 is an abundant number, since it is smaller than the sum of its proper divisors (1433221848).

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

681744096 is a wasteful number, since it uses less digits than its factorization.

681744096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215224 (or 215213 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 681744096 is about 26110.2297194031. The cubic root of 681744096 is about 880.1171056276.

The spelling of 681744096 in words is "six hundred eighty-one million, seven hundred forty-four thousand, ninety-six".