78560139209 has 8 divisors (see below), whose sum is σ = 81162350592. Its totient is φ = 75962178720.

The previous prime is 78560139187. The next prime is 78560139239. The reversal of 78560139209 is 90293106587.

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 78560139209 - 2¹² = 78560135113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78560139239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025129 + ... + 1099094.

It is an arithmetic number, because the mean of its divisors is an integer number (10145293824).

Almost surely, 2^78560139209 is an apocalyptic number.

It is an amenable number.

78560139209 is a deficient number, since it is larger than the sum of its proper divisors (2602211383).

78560139209 is a wasteful number, since it uses less digits than its factorization.

78560139209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125447.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 78560139209 in words is "seventy-eight billion, five hundred sixty million, one hundred thirty-nine thousand, two hundred nine".