78691054686720 has 320 divisors, whose sum is σ = 287579853639936. Its totient is φ = 17981743104000.

The previous prime is 78691054686689. The next prime is 78691054686763. The reversal of 78691054686720 is 2768645019687.

78691054686720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (320).

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 31 ways as a sum of consecutive naturals, for example, 203933970 + ... + 204319470.

Almost surely, 2^{78691054686720} is an apocalyptic number.

78691054686720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78691054686720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143789926819968).

78691054686720 is an abundant number, since it is smaller than the sum of its proper divisors (208888798953216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78691054686720 is a wasteful number, since it uses less digits than its factorization.

78691054686720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389331 (or 389315 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 69.

The spelling of 78691054686720 in words is "seventy-eight trillion, six hundred ninety-one billion, fifty-four million, six hundred eighty-six thousand, seven hundred twenty".