8081409680 has 80 divisors (see below), whose sum is σ = 20357339904. Its totient is φ = 2971637760.

The previous prime is 8081409659. The next prime is 8081409691. The reversal of 8081409680 is 869041808.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 10616 + ... + 127575.

Almost surely, 2^8081409680 is an apocalyptic number.

8081409680 is a gapful number since it is divisible by the number (80) 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 8081409680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10178669952).

8081409680 is an abundant number, since it is smaller than the sum of its proper divisors (12275930224).

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

8081409680 is a wasteful number, since it uses less digits than its factorization.

8081409680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138264 (or 138258 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 8081409680 is about 89896.6611170849. The cubic root of 8081409680 is about 2006.7612569449.

The spelling of 8081409680 in words is "eight billion, eighty-one million, four hundred nine thousand, six hundred eighty".