681712752 has 40 divisors (see below), whose sum is σ = 2012676736. Its totient is φ = 194774976.

The previous prime is 681712751. The next prime is 681712771. The reversal of 681712752 is 257217186.

It is a self number, because there is not a number n which added to its sum of digits gives 681712752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681712751) 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 in 7 ways as a sum of consecutive naturals, for example, 1014118 + ... + 1014789.

Almost surely, 2^681712752 is an apocalyptic number.

It is an amenable number.

681712752 is an abundant number, since it is smaller than the sum of its proper divisors (1330963984).

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

681712752 is a wasteful number, since it uses less digits than its factorization.

681712752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028925 (or 2028919 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 681712752 is about 26109.6294879878. The cubic root of 681712752 is about 880.1036172755.

The spelling of 681712752 in words is "six hundred eighty-one million, seven hundred twelve thousand, seven hundred fifty-two".