8581886981 has 16 divisors (see below), whose sum is σ = 8849818560. Its totient is φ = 8317330560.

The previous prime is 8581886939. The next prime is 8581887019. The reversal of 8581886981 is 1896881858.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8581886981 - 2²² = 8577692677 is a prime.

It is a super-2 number, since 2×8581886981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8581888981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3258041 + ... + 3260673.

It is an arithmetic number, because the mean of its divisors is an integer number (553113660).

Almost surely, 2^8581886981 is an apocalyptic number.

It is an amenable number.

8581886981 is a deficient number, since it is larger than the sum of its proper divisors (267931579).

8581886981 is a wasteful number, since it uses less digits than its factorization.

8581886981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236.

The product of its digits is 8847360, while the sum is 62.

The square root of 8581886981 is about 92638.4746258270. The cubic root of 8581886981 is about 2047.3602335068.

The spelling of 8581886981 in words is "eight billion, five hundred eighty-one million, eight hundred eighty-six thousand, nine hundred eighty-one".