1166023155 has 48 divisors (see below), whose sum is σ = 2121467040. Its totient is φ = 545825280.

The previous prime is 1166023127. The next prime is 1166023163. The reversal of 1166023155 is 5513206611.

It is not a de Polignac number, because 1166023155 - 2⁵ = 1166023123 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 41559 + ... + 63711.

It is an arithmetic number, because the mean of its divisors is an integer number (44197230).

Almost surely, 2^1166023155 is an apocalyptic number.

1166023155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166023155 is a deficient number, since it is larger than the sum of its proper divisors (955443885).

1166023155 is a wasteful number, since it uses less digits than its factorization.

1166023155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22212 (or 22201 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1166023155 is about 34147.0812076230. The cubic root of 1166023155 is about 1052.5330091975.

Adding to 1166023155 its reverse (5513206611), we get a palindrome (6679229766).

The spelling of 1166023155 in words is "one billion, one hundred sixty-six million, twenty-three thousand, one hundred fifty-five".