80391782016 has 640 divisors, whose sum is σ = 297057129600. Its totient is φ = 21015355392.

The previous prime is 80391781979. The next prime is 80391782017. The reversal of 80391782016 is 61028719308.

It is a super-2 number, since 2×80391782016² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80391782017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 131144526 + ... + 131145138.

It is an arithmetic number, because the mean of its divisors is an integer number (464151765).

Almost surely, 2^80391782016 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 80391782016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148528564800).

80391782016 is an abundant number, since it is smaller than the sum of its proper divisors (216665347584).

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

80391782016 is a wasteful number, since it uses less digits than its factorization.

80391782016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 80391782016 in words is "eighty billion, three hundred ninety-one million, seven hundred eighty-two thousand, sixteen".