80239403520 has 400 divisors, whose sum is σ = 294108408000. Its totient is φ = 20897243136.

The previous prime is 80239403467. The next prime is 80239403527. The reversal of 80239403520 is 2530493208.

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

It is not an unprimeable number, because it can be changed into a prime (80239403527) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8911981 + ... + 8920979.

It is an arithmetic number, because the mean of its divisors is an integer number (735271020).

Almost surely, 2^80239403520 is an apocalyptic number.

80239403520 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 80239403520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147054204000).

80239403520 is an abundant number, since it is smaller than the sum of its proper divisors (213869004480).

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

80239403520 is an equidigital number, since it uses as much as digits as its factorization.

80239403520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077 (or 9052 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 80239403520 its reverse (2530493208), we get a palindrome (82769896728).

The spelling of 80239403520 in words is "eighty billion, two hundred thirty-nine million, four hundred three thousand, five hundred twenty".