78568669567 has 2 divisors, whose sum is σ = 78568669568. Its totient is φ = 78568669566.

The previous prime is 78568669547. The next prime is 78568669573. The reversal of 78568669567 is 76596686587.

It is a strong prime.

It is an emirp because it is prime and its reverse (76596686587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78568669567 - 2³⁵ = 44208931199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78568669567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78568669537) 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 as a sum of consecutive naturals, namely, 39284334783 + 39284334784.

It is an arithmetic number, because the mean of its divisors is an integer number (39284334784).

Almost surely, 2^78568669567 is an apocalyptic number.

78568669567 is a deficient number, since it is larger than the sum of its proper divisors (1).

78568669567 is an equidigital number, since it uses as much as digits as its factorization.

78568669567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 914457600, while the sum is 73.

The spelling of 78568669567 in words is "seventy-eight billion, five hundred sixty-eight million, six hundred sixty-nine thousand, five hundred sixty-seven".