78947533840 has 360 divisors, whose sum is σ = 232453514880. Its totient is φ = 24793413120.

The previous prime is 78947533811. The next prime is 78947533849. The reversal of 78947533840 is 4833574987.

It is not an unprimeable number, because it can be changed into a prime (78947533849) 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 71 ways as a sum of consecutive naturals, for example, 71574729 + ... + 71575831.

It is an arithmetic number, because the mean of its divisors is an integer number (645704208).

Almost surely, 2^78947533840 is an apocalyptic number.

78947533840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78947533840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116226757440).

78947533840 is an abundant number, since it is smaller than the sum of its proper divisors (153505981040).

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

78947533840 is a wasteful number, since it uses less digits than its factorization.

78947533840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 78947533840 in words is "seventy-eight billion, nine hundred forty-seven million, five hundred thirty-three thousand, eight hundred forty".