1171240331905 has 32 divisors (see below), whose sum is σ = 1692425952000. Its totient is φ = 760140122112.

The previous prime is 1171240331903. The next prime is 1171240331923. The reversal of 1171240331905 is 5091330421711.

It is not a de Polignac number, because 1171240331905 - 2¹ = 1171240331903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1171240331903) 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 31 ways as a sum of consecutive naturals, for example, 141912 + ... + 1537081.

It is an arithmetic number, because the mean of its divisors is an integer number (52888311000).

Almost surely, 2^{1171240331905} is an apocalyptic number.

It is an amenable number.

1171240331905 is a deficient number, since it is larger than the sum of its proper divisors (521185620095).

1171240331905 is a wasteful number, since it uses less digits than its factorization.

1171240331905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680073.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 1171240331905 in words is "one trillion, one hundred seventy-one billion, two hundred forty million, three hundred thirty-one thousand, nine hundred five".