78854794039 has 12 divisors (see below), whose sum is σ = 91784101800. Its totient is φ = 67549256208.

The previous prime is 78854794027. The next prime is 78854794043. The reversal of 78854794039 is 93049745887.

It is not a de Polignac number, because 78854794039 - 2³¹ = 76707310391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78854794069) 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 11 ways as a sum of consecutive naturals, for example, 400329 + ... + 563890.

It is an arithmetic number, because the mean of its divisors is an integer number (7648675150).

Almost surely, 2^78854794039 is an apocalyptic number.

78854794039 is a deficient number, since it is larger than the sum of its proper divisors (12929307761).

78854794039 is a wasteful number, since it uses less digits than its factorization.

78854794039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965902 (or 965895 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 78854794039 in words is "seventy-eight billion, eight hundred fifty-four million, seven hundred ninety-four thousand, thirty-nine".