32828016721 has 4 divisors (see below), whose sum is σ = 32828504500. Its totient is φ = 32827528944.

The previous prime is 32828016691. The next prime is 32828016757. The reversal of 32828016721 is 12761082823.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17309086096 + 15518930625 = 131564^2 + 124575^2 .

It is a cyclic number.

It is not a de Polignac number, because 32828016721 - 2¹¹ = 32828014673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32828086721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122946 + ... + 284203.

It is an arithmetic number, because the mean of its divisors is an integer number (8207126125).

Almost surely, 2^32828016721 is an apocalyptic number.

It is an amenable number.

32828016721 is a deficient number, since it is larger than the sum of its proper divisors (487779).

32828016721 is an equidigital number, since it uses as much as digits as its factorization.

32828016721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487778.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 32828016721 in words is "thirty-two billion, eight hundred twenty-eight million, sixteen thousand, seven hundred twenty-one".