11556116011 has 16 divisors (see below), whose sum is σ = 13149208800. Its totient is φ = 10143265440.

The previous prime is 11556115997. The next prime is 11556116029. The reversal of 11556116011 is 11061165511.

It is not a de Polignac number, because 11556116011 - 2¹⁵ = 11556083243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11556116041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111096 + ... + 188293.

It is an arithmetic number, because the mean of its divisors is an integer number (821825550).

Almost surely, 2^11556116011 is an apocalyptic number.

11556116011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11556116011 is a deficient number, since it is larger than the sum of its proper divisors (1593092789).

11556116011 is an equidigital number, since it uses as much as digits as its factorization.

11556116011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299451 (or 299429 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 11556116011 in words is "eleven billion, five hundred fifty-six million, one hundred sixteen thousand, eleven".