78368244109 has 8 divisors (see below), whose sum is σ = 79258773600. Its totient is φ = 77479962000.

The previous prime is 78368244079. The next prime is 78368244169. The reversal of 78368244109 is 90144286387.

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 78368244109 - 2¹⁷ = 78368113037 is a prime.

It is a super-2 number, since 2×78368244109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78368244169) 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, 491659 + ... + 631240.

It is an arithmetic number, because the mean of its divisors is an integer number (9907346700).

Almost surely, 2^78368244109 is an apocalyptic number.

It is an amenable number.

78368244109 is a deficient number, since it is larger than the sum of its proper divisors (890529491).

78368244109 is a wasteful number, since it uses less digits than its factorization.

78368244109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123691.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 78368244109 in words is "seventy-eight billion, three hundred sixty-eight million, two hundred forty-four thousand, one hundred nine".