1091728093709 has 12 divisors (see below), whose sum is σ = 1200046803900. Its totient is φ = 992440257600.

The previous prime is 1091728093699. The next prime is 1091728093717. The reversal of 1091728093709 is 9073908271901.

It can be written as a sum of positive squares in 2 ways, for example, as 583283512900 + 508444580809 = 763730^2 + 713053^2 .

It is not a de Polignac number, because 1091728093709 - 2⁸ = 1091728093453 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 (1091728093009) 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 11 ways as a sum of consecutive naturals, for example, 3089867 + ... + 3425015.

It is an arithmetic number, because the mean of its divisors is an integer number (100003900325).

Almost surely, 2^{1091728093709} is an apocalyptic number.

It is an amenable number.

1091728093709 is a deficient number, since it is larger than the sum of its proper divisors (108318710191).

1091728093709 is a wasteful number, since it uses less digits than its factorization.

1091728093709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362092 (or 362081 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 56.

The spelling of 1091728093709 in words is "one trillion, ninety-one billion, seven hundred twenty-eight million, ninety-three thousand, seven hundred nine".