78856384992 has 192 divisors, whose sum is σ = 258273888768. Its totient is φ = 20466432000.

The previous prime is 78856384991. The next prime is 78856384993. The reversal of 78856384992 is 29948365887.

It is an interprime number because it is at equal distance from previous prime (78856384991) and next prime (78856384993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78856384991) by changing a digit.

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, 11979142 + ... + 11985722.

It is an arithmetic number, because the mean of its divisors is an integer number (1345176504).

Almost surely, 2^78856384992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78856384992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129136944384).

78856384992 is an abundant number, since it is smaller than the sum of its proper divisors (179417503776).

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

78856384992 is a wasteful number, since it uses less digits than its factorization.

78856384992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233 (or 8225 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 69.

The spelling of 78856384992 in words is "seventy-eight billion, eight hundred fifty-six million, three hundred eighty-four thousand, nine hundred ninety-two".