78784349339 has 16 divisors (see below), whose sum is σ = 83261317440. Its totient is φ = 74398832640.

The previous prime is 78784349323. The next prime is 78784349351. The reversal of 78784349339 is 93394348787.

It is a cyclic number.

It is not a de Polignac number, because 78784349339 - 2⁴ = 78784349323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78784349309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869309 + ... + 955649.

It is an arithmetic number, because the mean of its divisors is an integer number (5203832340).

Almost surely, 2^78784349339 is an apocalyptic number.

78784349339 is a deficient number, since it is larger than the sum of its proper divisors (4476968101).

78784349339 is a wasteful number, since it uses less digits than its factorization.

78784349339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86870.

The product of its digits is 109734912, while the sum is 65.

The spelling of 78784349339 in words is "seventy-eight billion, seven hundred eighty-four million, three hundred forty-nine thousand, three hundred thirty-nine".