11156116511 has 4 divisors (see below), whose sum is σ = 11163957792. Its totient is φ = 11148275232.

The previous prime is 11156116493. The next prime is 11156116529. The reversal of 11156116511 is 11561165111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11561165111 = 751 ⋅15394361.

It is an interprime number because it is at equal distance from previous prime (11156116493) and next prime (11156116529).

It is a cyclic number.

It is not a de Polignac number, because 11156116511 - 2²² = 11151922207 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 (11156116591) 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, 3918506 + ... + 3921351.

It is an arithmetic number, because the mean of its divisors is an integer number (2790989448).

Almost surely, 2^11156116511 is an apocalyptic number.

11156116511 is a deficient number, since it is larger than the sum of its proper divisors (7841281).

11156116511 is an equidigital number, since it uses as much as digits as its factorization.

11156116511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841280.

The product of its digits is 900, while the sum is 29.

The spelling of 11156116511 in words is "eleven billion, one hundred fifty-six million, one hundred sixteen thousand, five hundred eleven".