80819891808 has 96 divisors (see below), whose sum is σ = 214679808000. Its totient is φ = 26619411456.

The previous prime is 80819891783. The next prime is 80819891819.

80819891808 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20495085 + ... + 20499027.

It is an arithmetic number, because the mean of its divisors is an integer number (2236248000).

Almost surely, 2^80819891808 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 80819891808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107339904000).

80819891808 is an abundant number, since it is smaller than the sum of its proper divisors (133859916192).

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

80819891808 is a wasteful number, since it uses less digits than its factorization.

80819891808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 6436 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 60.

The spelling of 80819891808 in words is "eighty billion, eight hundred nineteen million, eight hundred ninety-one thousand, eight hundred eight".