78311334239 has 4 divisors (see below), whose sum is σ = 80427856824. Its totient is φ = 76194811656.

The previous prime is 78311334229. The next prime is 78311334253. The reversal of 78311334239 is 93243311387.

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

It is a cyclic number.

It is not a de Polignac number, because 78311334239 - 2¹⁶ = 78311268703 is a prime.

It is a super-2 number, since 2×78311334239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78311334239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78311334209) 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 3 ways as a sum of consecutive naturals, for example, 1058261237 + ... + 1058261310.

It is an arithmetic number, because the mean of its divisors is an integer number (20106964206).

Almost surely, 2^78311334239 is an apocalyptic number.

78311334239 is a deficient number, since it is larger than the sum of its proper divisors (2116522585).

78311334239 is a wasteful number, since it uses less digits than its factorization.

78311334239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116522584.

The product of its digits is 326592, while the sum is 44.

The spelling of 78311334239 in words is "seventy-eight billion, three hundred eleven million, three hundred thirty-four thousand, two hundred thirty-nine".