8564089978069 has 2 divisors, whose sum is σ = 8564089978070. Its totient is φ = 8564089978068.

The previous prime is 8564089978057. The next prime is 8564089978127. The reversal of 8564089978069 is 9608799804658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6794024706225 + 1770065271844 = 2606535^2 + 1330438^2 .

It is a cyclic number.

It is not a de Polignac number, because 8564089978069 - 2⁷ = 8564089977941 is a prime.

It is a super-2 number, since 2×8564089978069² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8564089978069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8564089978009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4282044989034 + 4282044989035.

It is an arithmetic number, because the mean of its divisors is an integer number (4282044989035).

Almost surely, 2^{8564089978069} is an apocalyptic number.

It is an amenable number.

8564089978069 is a deficient number, since it is larger than the sum of its proper divisors (1).

8564089978069 is an equidigital number, since it uses as much as digits as its factorization.

8564089978069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881169920, while the sum is 79.

The spelling of 8564089978069 in words is "eight trillion, five hundred sixty-four billion, eighty-nine million, nine hundred seventy-eight thousand, sixty-nine".