80440800840 has 256 divisors, whose sum is σ = 283530240000. Its totient is φ = 20229606144.

The previous prime is 80440800767. The next prime is 80440800893. The reversal of 80440800840 is 4800804408.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80440800795 and 80440800804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4567171 + ... + 4584749.

It is an arithmetic number, because the mean of its divisors is an integer number (1107540000).

Almost surely, 2^80440800840 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 80440800840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141765120000).

80440800840 is an abundant number, since it is smaller than the sum of its proper divisors (203089439160).

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

80440800840 is a wasteful number, since it uses less digits than its factorization.

80440800840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17841 (or 17831 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The spelling of 80440800840 in words is "eighty billion, four hundred forty million, eight hundred thousand, eight hundred forty".