80239403521 has 8 divisors (see below), whose sum is σ = 85711223304. Its totient is φ = 74851123200.

The previous prime is 80239403467. The next prime is 80239403527. The reversal of 80239403521 is 12530493208.

It can be written as a sum of positive squares in 4 ways, for example, as 51322896 + 80188080625 = 7164^2 + 283175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80239403521 is a prime.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20882880 + ... + 20886721.

It is an arithmetic number, because the mean of its divisors is an integer number (10713902913).

Almost surely, 2^80239403521 is an apocalyptic number.

It is an amenable number.

80239403521 is a deficient number, since it is larger than the sum of its proper divisors (5471819783).

80239403521 is a wasteful number, since it uses less digits than its factorization.

80239403521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41769731.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 80239403521 its reverse (12530493208), we get a palindrome (92769896729).

The spelling of 80239403521 in words is "eighty billion, two hundred thirty-nine million, four hundred three thousand, five hundred twenty-one".