78391281480 has 256 divisors, whose sum is σ = 250076160000. Its totient is φ = 19603353600.

The previous prime is 78391281439. The next prime is 78391281481. The reversal of 78391281480 is 8418219387.

It is a super-3 number, since 3×78391281480³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78391281481) by changing a digit.

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, 163655881 + ... + 163656359.

It is an arithmetic number, because the mean of its divisors is an integer number (976860000).

Almost surely, 2^78391281480 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 78391281480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125038080000).

78391281480 is an abundant number, since it is smaller than the sum of its proper divisors (171684878520).

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

78391281480 is a wasteful number, since it uses less digits than its factorization.

78391281480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 78391281480 in words is "seventy-eight billion, three hundred ninety-one million, two hundred eighty-one thousand, four hundred eighty".