80591043840 has 288 divisors, whose sum is σ = 265213218816. Its totient is φ = 20841431040.

The previous prime is 80591043823. The next prime is 80591043851. The reversal of 80591043840 is 4834019508.

It is a junction number, because it is equal to n+sod(n) for n = 80591043792 and 80591043801.

It is a congruent number.

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, 54415900 + ... + 54417380.

It is an arithmetic number, because the mean of its divisors is an integer number (920879232).

Almost surely, 2^80591043840 is an apocalyptic number.

80591043840 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 80591043840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132606609408).

80591043840 is an abundant number, since it is smaller than the sum of its proper divisors (184622174976).

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

80591043840 is a wasteful number, since it uses less digits than its factorization.

80591043840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 80591043840 in words is "eighty billion, five hundred ninety-one million, forty-three thousand, eight hundred forty".