12728521769833 has 8 divisors (see below), whose sum is σ = 12809893061952. Its totient is φ = 12647154248976.

The previous prime is 12728521769801. The next prime is 12728521769851. The reversal of 12728521769833 is 33896712582721.

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 12728521769833 - 2⁵ = 12728521769801 is a prime.

It is a super-2 number, since 2×12728521769833² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12728521769863) 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, 5991516 + ... + 7832962.

It is an arithmetic number, because the mean of its divisors is an integer number (1601236632744).

Almost surely, 2^{12728521769833} is an apocalyptic number.

It is an amenable number.

12728521769833 is a deficient number, since it is larger than the sum of its proper divisors (81371292119).

12728521769833 is a wasteful number, since it uses less digits than its factorization.

12728521769833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885631.

The product of its digits is 60963840, while the sum is 64.

The spelling of 12728521769833 in words is "twelve trillion, seven hundred twenty-eight billion, five hundred twenty-one million, seven hundred sixty-nine thousand, eight hundred thirty-three".