80781412320 has 768 divisors, whose sum is σ = 346042368000. Its totient is φ = 17188816896.

The previous prime is 80781412253. The next prime is 80781412331. The reversal of 80781412320 is 2321418708.

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

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 33897849 + ... + 33900231.

It is an arithmetic number, because the mean of its divisors is an integer number (450576000).

Almost surely, 2^80781412320 is an apocalyptic number.

80781412320 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 80781412320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173021184000).

80781412320 is an abundant number, since it is smaller than the sum of its proper divisors (265260955680).

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

80781412320 is a wasteful number, since it uses less digits than its factorization.

80781412320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 2478 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 80781412320 in words is "eighty billion, seven hundred eighty-one million, four hundred twelve thousand, three hundred twenty".