1115881382945 has 16 divisors (see below), whose sum is σ = 1534347325440. Its totient is φ = 763177948224.

The previous prime is 1115881382939. The next prime is 1115881382971. The reversal of 1115881382945 is 5492831885111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1115881382945 - 2⁴ = 1115881382929 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 41608430 + ... + 41635239.

It is an arithmetic number, because the mean of its divisors is an integer number (95896707840).

Almost surely, 2^{1115881382945} is an apocalyptic number.

It is an amenable number.

1115881382945 is a deficient number, since it is larger than the sum of its proper divisors (418465942495).

1115881382945 is an equidigital number, since it uses as much as digits as its factorization.

1115881382945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83244064.

The product of its digits is 2764800, while the sum is 56.

The spelling of 1115881382945 in words is "one trillion, one hundred fifteen billion, eight hundred eighty-one million, three hundred eighty-two thousand, nine hundred forty-five".