681580032 has 80 divisors (see below), whose sum is σ = 2075200512. Its totient is φ = 194734080.

The previous prime is 681580021. The next prime is 681580033. The reversal of 681580032 is 230085186.

It is a happy number.

It is a super-2 number, since 2×681580032² = 929102680042242048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681579975 and 681580002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681580033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20944 + ... + 42447.

Almost surely, 2^681580032 is an apocalyptic number.

It is an amenable number.

681580032 is an abundant number, since it is smaller than the sum of its proper divisors (1393620480).

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

681580032 is an equidigital number, since it uses as much as digits as its factorization.

681580032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63419 (or 63403 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 681580032 is about 26107.0877732466. The cubic root of 681580032 is about 880.0464989204.

The spelling of 681580032 in words is "six hundred eighty-one million, five hundred eighty thousand, thirty-two".