8564381815764 has 12 divisors (see below), whose sum is σ = 19983557570144. Its totient is φ = 2854793938584.

The previous prime is 8564381815753. The next prime is 8564381815777. The reversal of 8564381815764 is 4675181834658.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 8564381815695 and 8564381815704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356849242312 + ... + 356849242335.

Almost surely, 2^{8564381815764} is an apocalyptic number.

It is an amenable number.

8564381815764 is an abundant number, since it is smaller than the sum of its proper divisors (11419175754380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8564381815764 is a wasteful number, since it uses less digits than its factorization.

8564381815764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713698484654 (or 713698484652 counting only the distinct ones).

The product of its digits is 154828800, while the sum is 66.

The spelling of 8564381815764 in words is "eight trillion, five hundred sixty-four billion, three hundred eighty-one million, eight hundred fifteen thousand, seven hundred sixty-four".