11078194009 has 3 divisors (see below), whose sum is σ = 11078299263. Its totient is φ = 11078088756.

The previous prime is 11078193991. The next prime is 11078194067. The reversal of 11078194009 is 90049187011.

The square root of 11078194009 is 105253.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 720654025 + 10357539984 = 26845^2 + 101772^2 .

It is not a de Polignac number, because 11078194009 - 2¹⁹ = 11077669721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11078114009) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52627 + ... + 157879.

It is an arithmetic number, because the mean of its divisors is an integer number (3692766421).

Almost surely, 2^11078194009 is an apocalyptic number.

11078194009 is the 105253-rd square number.

11078194009 is the 52627-th centered octagonal number.

It is an amenable number.

11078194009 is a deficient number, since it is larger than the sum of its proper divisors (105254).

11078194009 is an frugal number, since it uses more digits than its factorization.

11078194009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210506 (or 105253 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 11078194009 in words is "eleven billion, seventy-eight million, one hundred ninety-four thousand, nine".