1156446009 has 12 divisors (see below), whose sum is σ = 1672814052. Its totient is φ = 769860000.

The previous prime is 1156445987. The next prime is 1156446013. The reversal of 1156446009 is 9006446511.

1156446009 is a `hidden beast` number, since 1 + 1 + 5 + 6 + 44 + 600 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 842624784 + 313821225 = 29028^2 + 17715^2 .

It is not a de Polignac number, because 1156446009 - 2⁸ = 1156445753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1156446019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85342 + ... + 97959.

It is an arithmetic number, because the mean of its divisors is an integer number (139401171).

Almost surely, 2^1156446009 is an apocalyptic number.

It is an amenable number.

1156446009 is a deficient number, since it is larger than the sum of its proper divisors (516368043).

1156446009 is a wasteful number, since it uses less digits than its factorization.

1156446009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184008 (or 184005 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1156446009 is about 34006.5583233587. The cubic root of 1156446009 is about 1049.6434190546.

The spelling of 1156446009 in words is "one billion, one hundred fifty-six million, four hundred forty-six thousand, nine".