78889008979 has 16 divisors (see below), whose sum is σ = 86268015360. Its totient is φ = 71544708000.

The previous prime is 78889008911. The next prime is 78889009007. The reversal of 78889008979 is 97980098887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78889008979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78889008379) 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, 17963874 + ... + 17968264.

It is an arithmetic number, because the mean of its divisors is an integer number (5391750960).

Almost surely, 2^78889008979 is an apocalyptic number.

78889008979 is a deficient number, since it is larger than the sum of its proper divisors (7379006381).

78889008979 is a wasteful number, since it uses less digits than its factorization.

78889008979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7962.

The product of its (nonzero) digits is 146313216, while the sum is 73.

The spelling of 78889008979 in words is "seventy-eight billion, eight hundred eighty-nine million, eight thousand, nine hundred seventy-nine".