681580089 has 20 divisors (see below), whose sum is σ = 1018934224. Its totient is φ = 454042584.

The previous prime is 681580061. The next prime is 681580093. The reversal of 681580089 is 980085186.

681580089 is a `hidden beast` number, since 68 + 1 + 580 + 0 + 8 + 9 = 666.

It is not a de Polignac number, because 681580089 - 2²⁵ = 648025657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681500089) 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 19 ways as a sum of consecutive naturals, for example, 148974 + ... + 153480.

Almost surely, 2^681580089 is an apocalyptic number.

It is an amenable number.

681580089 is a deficient number, since it is larger than the sum of its proper divisors (337354135).

681580089 is a wasteful number, since it uses less digits than its factorization.

681580089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386 (or 6377 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 681580089 is about 26107.0888649041. The cubic root of 681580089 is about 880.0465234529.

The spelling of 681580089 in words is "six hundred eighty-one million, five hundred eighty thousand, eighty-nine".