8081396784 has 80 divisors (see below), whose sum is σ = 23350410240. Its totient is φ = 2675937600.

The previous prime is 8081396761. The next prime is 8081396797. The reversal of 8081396784 is 4876931808.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 8081396784.

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 15 ways as a sum of consecutive naturals, for example, 3289 + ... + 127175.

It is an arithmetic number, because the mean of its divisors is an integer number (291880128).

Almost surely, 2^8081396784 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 8081396784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11675205120).

8081396784 is an abundant number, since it is smaller than the sum of its proper divisors (15269013456).

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

8081396784 is a wasteful number, since it uses less digits than its factorization.

8081396784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124055 (or 124043 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 8081396784 is about 89896.5893902544. The cubic root of 8081396784 is about 2006.7601895071.

The spelling of 8081396784 in words is "eight billion, eighty-one million, three hundred ninety-six thousand, seven hundred eighty-four".