80432731920 has 320 divisors, whose sum is σ = 273646771200. Its totient is φ = 19465205760.

The previous prime is 80432731889. The next prime is 80432731927. The reversal of 80432731920 is 2913723408.

It is a super-2 number, since 2×80432731920² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80432731927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17321119 + ... + 17325761.

It is an arithmetic number, because the mean of its divisors is an integer number (855146160).

Almost surely, 2^80432731920 is an apocalyptic number.

80432731920 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 80432731920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136823385600).

80432731920 is an abundant number, since it is smaller than the sum of its proper divisors (193214039280).

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

80432731920 is a wasteful number, since it uses less digits than its factorization.

80432731920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 80432731920 in words is "eighty billion, four hundred thirty-two million, seven hundred thirty-one thousand, nine hundred twenty".