1188118811 has 16 divisors (see below), whose sum is σ = 1366028160. Its totient is φ = 1021999680.

The previous prime is 1188118793. The next prime is 1188118823.

It is a happy number.

1188118811 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1188118811 is a prime.

1188118811 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1188111811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192800 + ... + 198866.

It is an arithmetic number, because the mean of its divisors is an integer number (85376760).

Almost surely, 2^1188118811 is an apocalyptic number.

1188118811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1188118811 is a deficient number, since it is larger than the sum of its proper divisors (177909349).

1188118811 is a wasteful number, since it uses less digits than its factorization.

1188118811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034.

The product of its digits is 4096, while the sum is 38.

The square root of 1188118811 is about 34469.0993645033. The cubic root of 1188118811 is about 1059.1398061731.

The spelling of 1188118811 in words is "one billion, one hundred eighty-eight million, one hundred eighteen thousand, eight hundred eleven".