5511156111 has 16 divisors (see below), whose sum is σ = 8186233600. Its totient is φ = 3664403064.

The previous prime is 5511156083. The next prime is 5511156113. The reversal of 5511156111 is 1116511155.

It is not a de Polignac number, because 5511156111 - 2¹¹ = 5511154063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5511156113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259051 + ... + 279516.

It is an arithmetic number, because the mean of its divisors is an integer number (511639600).

Almost surely, 2^5511156111 is an apocalyptic number.

5511156111 is a deficient number, since it is larger than the sum of its proper divisors (2675077489).

5511156111 is a wasteful number, since it uses less digits than its factorization.

5511156111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538955 (or 538949 counting only the distinct ones).

The product of its digits is 750, while the sum is 27.

The square root of 5511156111 is about 74237.1612536471. The cubic root of 5511156111 is about 1766.3668451962.

Adding to 5511156111 its reverse (1116511155), we get a palindrome (6627667266).

The spelling of 5511156111 in words is "five billion, five hundred eleven million, one hundred fifty-six thousand, one hundred eleven".