1181153905 has 16 divisors (see below), whose sum is σ = 1543435200. Its totient is φ = 864319680.

The previous prime is 1181153903. The next prime is 1181153929. The reversal of 1181153905 is 5093511811.

It is a happy number.

It is not a de Polignac number, because 1181153905 - 2¹ = 1181153903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1181153903) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 211611 + ... + 217120.

It is an arithmetic number, because the mean of its divisors is an integer number (96464700).

Almost surely, 2^1181153905 is an apocalyptic number.

It is an amenable number.

1181153905 is a deficient number, since it is larger than the sum of its proper divisors (362281295).

1181153905 is a wasteful number, since it uses less digits than its factorization.

1181153905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428784.

The product of its (nonzero) digits is 5400, while the sum is 34.

The square root of 1181153905 is about 34367.9197071921. The cubic root of 1181153905 is about 1057.0661440516.

The spelling of 1181153905 in words is "one billion, one hundred eighty-one million, one hundred fifty-three thousand, nine hundred five".