8481391872 has 36 divisors (see below), whose sum is σ = 22572873120. Its totient is φ = 2827130368.

The previous prime is 8481391861. The next prime is 8481391901. The reversal of 8481391872 is 2781931848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5520972 + ... + 5522507.

Almost surely, 2^8481391872 is an apocalyptic number.

It is an amenable number.

8481391872 is an abundant number, since it is smaller than the sum of its proper divisors (14091481248).

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

8481391872 is a wasteful number, since it uses less digits than its factorization.

8481391872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043498 (or 11043484 counting only the distinct ones).

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

The square root of 8481391872 is about 92094.4725377153. The cubic root of 8481391872 is about 2039.3372087517.

The spelling of 8481391872 in words is "eight billion, four hundred eighty-one million, three hundred ninety-one thousand, eight hundred seventy-two".