8816581361 has 16 divisors (see below), whose sum is σ = 10673130240. Its totient is φ = 7109652480.

The previous prime is 8816581309. The next prime is 8816581393. The reversal of 8816581361 is 1631856188.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-8816581361 is a prime.

It is a super-2 number, since 2×8816581361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8816581861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308945 + ... + 336273.

It is an arithmetic number, because the mean of its divisors is an integer number (667070640).

Almost surely, 2^8816581361 is an apocalyptic number.

It is an amenable number.

8816581361 is a deficient number, since it is larger than the sum of its proper divisors (1856548879).

8816581361 is a wasteful number, since it uses less digits than its factorization.

8816581361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30064.

The product of its digits is 276480, while the sum is 47.

The square root of 8816581361 is about 93896.6525548169. The cubic root of 8816581361 is about 2065.8561301442.

The spelling of 8816581361 in words is "eight billion, eight hundred sixteen million, five hundred eighty-one thousand, three hundred sixty-one".