1091066067109 has 4 divisors (see below), whose sum is σ = 1108952396140. Its totient is φ = 1073179738080.

The previous prime is 1091066067107. The next prime is 1091066067151. The reversal of 1091066067109 is 9017606601901.

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 72520874209 + 1018545192900 = 269297^2 + 1009230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091066067109 - 2¹ = 1091066067107 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 (1091066067107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8943164424 + ... + 8943164545.

It is an arithmetic number, because the mean of its divisors is an integer number (277238099035).

Almost surely, 2^{1091066067109} is an apocalyptic number.

It is an amenable number.

1091066067109 is a deficient number, since it is larger than the sum of its proper divisors (17886329031).

1091066067109 is an equidigital number, since it uses as much as digits as its factorization.

1091066067109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17886329030.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 1091066067109 in words is "one trillion, ninety-one billion, sixty-six million, sixty-seven thousand, one hundred nine".