1166123323155 has 64 divisors (see below), whose sum is σ = 2245438540800. Its totient is φ = 504832020480.

The previous prime is 1166123323153. The next prime is 1166123323159. The reversal of 1166123323155 is 5513233216611.

It is not a de Polignac number, because 1166123323155 - 2¹ = 1166123323153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166123323153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5092935 + ... + 5316975.

It is an arithmetic number, because the mean of its divisors is an integer number (35084977200).

Almost surely, 2^{1166123323155} is an apocalyptic number.

1166123323155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166123323155 is a deficient number, since it is larger than the sum of its proper divisors (1079315217645).

1166123323155 is a wasteful number, since it uses less digits than its factorization.

1166123323155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226684.

The product of its digits is 97200, while the sum is 39.

Adding to 1166123323155 its reverse (5513233216611), we get a palindrome (6679356539766).

The spelling of 1166123323155 in words is "one trillion, one hundred sixty-six billion, one hundred twenty-three million, three hundred twenty-three thousand, one hundred fifty-five".