78842064209 has 8 divisors (see below), whose sum is σ = 80143301280. Its totient is φ = 77544488736.

The previous prime is 78842064187. The next prime is 78842064233. The reversal of 78842064209 is 90246024887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78842064209 - 2¹² = 78842060113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78842064269) 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 7 ways as a sum of consecutive naturals, for example, 871964 + ... + 958125.

It is an arithmetic number, because the mean of its divisors is an integer number (10017912660).

Almost surely, 2^78842064209 is an apocalyptic number.

It is an amenable number.

78842064209 is a deficient number, since it is larger than the sum of its proper divisors (1301237071).

78842064209 is a wasteful number, since it uses less digits than its factorization.

78842064209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830799.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 78842064209 in words is "seventy-eight billion, eight hundred forty-two million, sixty-four thousand, two hundred nine".