80399329920 has 2304 divisors, whose sum is σ = 391358822400. Its totient is φ = 15371845632.

The previous prime is 80399329909. The next prime is 80399329921. The reversal of 80399329920 is 2992399308.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (80399329921) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3495623029 + ... + 3495623051.

It is an arithmetic number, because the mean of its divisors is an integer number (169860600).

Almost surely, 2^80399329920 is an apocalyptic number.

80399329920 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 80399329920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195679411200).

80399329920 is an abundant number, since it is smaller than the sum of its proper divisors (310959492480).

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

80399329920 is a wasteful number, since it uses less digits than its factorization.

80399329920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 80399329920 in words is "eighty billion, three hundred ninety-nine million, three hundred twenty-nine thousand, nine hundred twenty".