78473448840 has 128 divisors (see below), whose sum is σ = 248089132800. Its totient is φ = 19818163200.

The previous prime is 78473448839. The next prime is 78473448877. The reversal of 78473448840 is 4884437487.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138006 + ... + 419514.

It is an arithmetic number, because the mean of its divisors is an integer number (1938196350).

Almost surely, 2^78473448840 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 78473448840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124044566400).

78473448840 is an abundant number, since it is smaller than the sum of its proper divisors (169615683960).

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

78473448840 is a wasteful number, since it uses less digits than its factorization.

78473448840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281647 (or 281643 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 57.

The spelling of 78473448840 in words is "seventy-eight billion, four hundred seventy-three million, four hundred forty-eight thousand, eight hundred forty".