78839801280 has 280 divisors, whose sum is σ = 288030196608. Its totient is φ = 20455483392.

The previous prime is 78839801263. The next prime is 78839801291. The reversal of 78839801280 is 8210893887.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 917937 + ... + 1000143.

Almost surely, 2^78839801280 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 78839801280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144015098304).

78839801280 is an abundant number, since it is smaller than the sum of its proper divisors (209190395328).

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

78839801280 is a wasteful number, since it uses less digits than its factorization.

78839801280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82273 (or 82254 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 78839801280 in words is "seventy-eight billion, eight hundred thirty-nine million, eight hundred one thousand, two hundred eighty".