8564089978079 has 4 divisors (see below), whose sum is σ = 8582428500984. Its totient is φ = 8545751455176.

The previous prime is 8564089978069. The next prime is 8564089978127. The reversal of 8564089978079 is 9708799804658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8564089978079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8564089977994 and 8564089978012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8564089978009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9169260752 + ... + 9169261685.

It is an arithmetic number, because the mean of its divisors is an integer number (2145607125246).

Almost surely, 2^{8564089978079} is an apocalyptic number.

8564089978079 is a deficient number, since it is larger than the sum of its proper divisors (18338522905).

8564089978079 is a wasteful number, since it uses less digits than its factorization.

8564089978079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18338522904.

The product of its (nonzero) digits is 2194698240, while the sum is 80.

The spelling of 8564089978079 in words is "eight trillion, five hundred sixty-four billion, eighty-nine million, nine hundred seventy-eight thousand, seventy-nine".