78889660792 has 8 divisors (see below), whose sum is σ = 147918114000. Its totient is φ = 39444830392.

The previous prime is 78889660789. The next prime is 78889660853. The reversal of 78889660792 is 29706698887.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4930603792 + ... + 4930603807.

It is an arithmetic number, because the mean of its divisors is an integer number (18489764250).

Almost surely, 2^78889660792 is an apocalyptic number.

It is an amenable number.

78889660792 is a deficient number, since it is larger than the sum of its proper divisors (69028453208).

78889660792 is a wasteful number, since it uses less digits than its factorization.

78889660792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9861207605 (or 9861207601 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 78889660792 in words is "seventy-eight billion, eight hundred eighty-nine million, six hundred sixty thousand, seven hundred ninety-two".