11071109809 has 4 divisors (see below), whose sum is σ = 11178596416. Its totient is φ = 10963623204.

The previous prime is 11071109807. The next prime is 11071109813. The reversal of 11071109809 is 90890117011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11071109809 - 2¹ = 11071109807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11071109807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53743149 + ... + 53743354.

It is an arithmetic number, because the mean of its divisors is an integer number (2794649104).

Almost surely, 2^11071109809 is an apocalyptic number.

It is an amenable number.

11071109809 is a deficient number, since it is larger than the sum of its proper divisors (107486607).

11071109809 is a wasteful number, since it uses less digits than its factorization.

11071109809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107486606.

The product of its (nonzero) digits is 4536, while the sum is 37.

It can be divided in two parts, 1107 and 1109809, that added together give a square (1110916 = 1054²).

The spelling of 11071109809 in words is "eleven billion, seventy-one million, one hundred nine thousand, eight hundred nine".