681744496 has 10 divisors (see below), whose sum is σ = 1320879992. Its totient is φ = 340872240.

The previous prime is 681744493. The next prime is 681744517. The reversal of 681744496 is 694447186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681744493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21304500 + ... + 21304531.

Almost surely, 2^681744496 is an apocalyptic number.

It is an amenable number.

681744496 is a deficient number, since it is larger than the sum of its proper divisors (639135496).

681744496 is a wasteful number, since it uses less digits than its factorization.

681744496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42609039 (or 42609033 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 681744496 is about 26110.2373792350. The cubic root of 681744496 is about 880.1172777581.

The spelling of 681744496 in words is "six hundred eighty-one million, seven hundred forty-four thousand, four hundred ninety-six".