8581395684421 has 16 divisors (see below), whose sum is σ = 9862123264000. Its totient is φ = 7314413066928.

The previous prime is 8581395684409. The next prime is 8581395684427. The reversal of 8581395684421 is 1244865931858.

It is a cyclic number.

It is not a de Polignac number, because 8581395684421 - 2¹⁹ = 8581395160133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8581395684427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756190 + ... + 4211248.

It is an arithmetic number, because the mean of its divisors is an integer number (616382704000).

Almost surely, 2^{8581395684421} is an apocalyptic number.

It is an amenable number.

8581395684421 is a deficient number, since it is larger than the sum of its proper divisors (1280727579579).

8581395684421 is a wasteful number, since it uses less digits than its factorization.

8581395684421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457048.

The product of its digits is 66355200, while the sum is 64.

The spelling of 8581395684421 in words is "eight trillion, five hundred eighty-one billion, three hundred ninety-five million, six hundred eighty-four thousand, four hundred twenty-one".