78865320000 has 280 divisors, whose sum is σ = 262259949952. Its totient is φ = 20908800000.

The previous prime is 78865319903. The next prime is 78865320013. The reversal of 78865320000 is 2356887.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21718185 + ... + 21721815.

Almost surely, 2^78865320000 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 78865320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131129974976).

78865320000 is an abundant number, since it is smaller than the sum of its proper divisors (183394629952).

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

78865320000 is a wasteful number, since it uses less digits than its factorization.

78865320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847 (or 3822 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

Adding to 78865320000 its reverse (2356887), we get a palindrome (78867676887).

The spelling of 78865320000 in words is "seventy-eight billion, eight hundred sixty-five million, three hundred twenty thousand".