1326728893309 has 16 divisors (see below), whose sum is σ = 1442864719296. Its totient is φ = 1214831520000.

The previous prime is 1326728893289. The next prime is 1326728893331. The reversal of 1326728893309 is 9033988276231.

It is a cyclic number.

It is not a de Polignac number, because 1326728893309 - 2⁵ = 1326728893277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326729893309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7619794 + ... + 7791964.

It is an arithmetic number, because the mean of its divisors is an integer number (90179044956).

Almost surely, 2^{1326728893309} is an apocalyptic number.

It is an amenable number.

1326728893309 is a deficient number, since it is larger than the sum of its proper divisors (116135825987).

1326728893309 is a wasteful number, since it uses less digits than its factorization.

1326728893309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184476.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 1326728893309 in words is "one trillion, three hundred twenty-six billion, seven hundred twenty-eight million, eight hundred ninety-three thousand, three hundred nine".