11561115011 has 8 divisors (see below), whose sum is σ = 11662732224. Its totient is φ = 11459931840.

The previous prime is 11561114989. The next prime is 11561115019. The reversal of 11561115011 is 11051116511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11561115011 - 2⁶ = 11561114947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561115019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54890 + ... + 161663.

It is an arithmetic number, because the mean of its divisors is an integer number (1457841528).

Almost surely, 2^11561115011 is an apocalyptic number.

11561115011 is a deficient number, since it is larger than the sum of its proper divisors (101617213).

11561115011 is a wasteful number, since it uses less digits than its factorization.

11561115011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217021.

The product of its (nonzero) digits is 150, while the sum is 23.

The spelling of 11561115011 in words is "eleven billion, five hundred sixty-one million, one hundred fifteen thousand, eleven".