1161316155 has 24 divisors (see below), whose sum is σ = 1973842992. Its totient is φ = 582932992.

The previous prime is 1161316147. The next prime is 1161316171. The reversal of 1161316155 is 5516131611.

It is not a de Polignac number, because 1161316155 - 2³ = 1161316147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129612 + ... + 138281.

It is an arithmetic number, because the mean of its divisors is an integer number (82243458).

Almost surely, 2^1161316155 is an apocalyptic number.

1161316155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161316155 is a deficient number, since it is larger than the sum of its proper divisors (812526837).

1161316155 is a wasteful number, since it uses less digits than its factorization.

1161316155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267935 (or 267918 counting only the distinct ones).

The product of its digits is 2700, while the sum is 30.

The square root of 1161316155 is about 34078.0890749467. The cubic root of 1161316155 is about 1051.1148114226.

Adding to 1161316155 its reverse (5516131611), we get a palindrome (6677447766).

The spelling of 1161316155 in words is "one billion, one hundred sixty-one million, three hundred sixteen thousand, one hundred fifty-five".