78831323339 has 4 divisors (see below), whose sum is σ = 83468460024. Its totient is φ = 74194186656.

The previous prime is 78831323317. The next prime is 78831323341. The reversal of 78831323339 is 93332313887.

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 78831323339 - 2⁸ = 78831323083 is a prime.

It is a super-2 number, since 2×78831323339² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78831323369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318568317 + ... + 2318568350.

It is an arithmetic number, because the mean of its divisors is an integer number (20867115006).

Almost surely, 2^78831323339 is an apocalyptic number.

78831323339 is a deficient number, since it is larger than the sum of its proper divisors (4637136685).

78831323339 is a wasteful number, since it uses less digits than its factorization.

78831323339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637136684.

The product of its digits is 1959552, while the sum is 50.

The spelling of 78831323339 in words is "seventy-eight billion, eight hundred thirty-one million, three hundred twenty-three thousand, three hundred thirty-nine".