8581127994881 has 16 divisors (see below), whose sum is σ = 9785428606800. Its totient is φ = 7454630596608.

The previous prime is 8581127994731. The next prime is 8581127994913. The reversal of 8581127994881 is 1884997211858.

It can be written as a sum of positive squares in 8 ways, for example, as 2213075744881 + 6368052250000 = 1487641^2 + 2523500^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8581127994881 is a prime.

It is a super-2 number, since 2×8581127994881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8581127994581) 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, 2343065 + ... + 4759433.

It is an arithmetic number, because the mean of its divisors is an integer number (611589287925).

Almost surely, 2^{8581127994881} is an apocalyptic number.

It is an amenable number.

8581127994881 is a deficient number, since it is larger than the sum of its proper divisors (1204300611919).

8581127994881 is a wasteful number, since it uses less digits than its factorization.

8581127994881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432468.

The product of its digits is 92897280, while the sum is 71.

The spelling of 8581127994881 in words is "eight trillion, five hundred eighty-one billion, one hundred twenty-seven million, nine hundred ninety-four thousand, eight hundred eighty-one".