1181117944 has 16 divisors (see below), whose sum is σ = 2245788720. Its totient is φ = 582240960.

The previous prime is 1181117921. The next prime is 1181117953. The reversal of 1181117944 is 4497111811.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1039149 + ... + 1040284.

It is an arithmetic number, because the mean of its divisors is an integer number (140361795).

Almost surely, 2^1181117944 is an apocalyptic number.

It is an amenable number.

1181117944 is a deficient number, since it is larger than the sum of its proper divisors (1064670776).

1181117944 is a wasteful number, since it uses less digits than its factorization.

1181117944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079510 (or 2079506 counting only the distinct ones).

The product of its digits is 8064, while the sum is 37.

The square root of 1181117944 is about 34367.3965263591. The cubic root of 1181117944 is about 1057.0554162536.

The spelling of 1181117944 in words is "one billion, one hundred eighty-one million, one hundred seventeen thousand, nine hundred forty-four".