78912686798 has 32 divisors (see below), whose sum is σ = 132308951040. Its totient is φ = 34986712000.

The previous prime is 78912686737. The next prime is 78912686849. The reversal of 78912686798 is 89768621987.

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 in 15 ways as a sum of consecutive naturals, for example, 6227393 + ... + 6240051.

It is an arithmetic number, because the mean of its divisors is an integer number (4134654720).

Almost surely, 2^78912686798 is an apocalyptic number.

78912686798 is a deficient number, since it is larger than the sum of its proper divisors (53396264242).

78912686798 is a wasteful number, since it uses less digits than its factorization.

78912686798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19624.

The product of its digits is 146313216, while the sum is 71.

The spelling of 78912686798 in words is "seventy-eight billion, nine hundred twelve million, six hundred eighty-six thousand, seven hundred ninety-eight".