78501086280 has 256 divisors, whose sum is σ = 275747328000. Its totient is φ = 19809909504.

The previous prime is 78501086243. The next prime is 78501086291. The reversal of 78501086280 is 8268010587.

78501086280 is a `hidden beast` number, since 7 + 8 + 5 + 0 + 10 + 8 + 628 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26818177 + ... + 26821103.

It is an arithmetic number, because the mean of its divisors is an integer number (1077138000).

Almost surely, 2^78501086280 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 78501086280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137873664000).

78501086280 is an abundant number, since it is smaller than the sum of its proper divisors (197246241720).

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

78501086280 is a wasteful number, since it uses less digits than its factorization.

78501086280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273 (or 4263 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 78501086280 in words is "seventy-eight billion, five hundred one million, eighty-six thousand, two hundred eighty".