33128830681 has 8 divisors (see below), whose sum is σ = 33771469320. Its totient is φ = 32486842752.

The previous prime is 33128830661. The next prime is 33128830703. The reversal of 33128830681 is 18603882133.

It can be written as a sum of positive squares in 4 ways, for example, as 18737229456 + 14391601225 = 136884^2 + 119965^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 33128830681 - 2¹⁵ = 33128797913 is a prime.

It is a super-2 number, since 2×33128830681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33128830661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59236 + ... + 264133.

It is an arithmetic number, because the mean of its divisors is an integer number (4221433665).

Almost surely, 2^33128830681 is an apocalyptic number.

It is an amenable number.

33128830681 is a deficient number, since it is larger than the sum of its proper divisors (642638639).

33128830681 is a wasteful number, since it uses less digits than its factorization.

33128830681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325355.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 33128830681 in words is "thirty-three billion, one hundred twenty-eight million, eight hundred thirty thousand, six hundred eighty-one".