1109403185618 has 16 divisors (see below), whose sum is σ = 2048128958400. Its totient is φ = 438884776656.

The previous prime is 1109403185617. The next prime is 1109403185677. The reversal of 1109403185618 is 8165813049011.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1109403185617) 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 7 ways as a sum of consecutive naturals, for example, 3047810768 + ... + 3047811131.

It is an arithmetic number, because the mean of its divisors is an integer number (128008059900).

Almost surely, 2^{1109403185618} is an apocalyptic number.

1109403185618 is a deficient number, since it is larger than the sum of its proper divisors (938725772782).

1109403185618 is a wasteful number, since it uses less digits than its factorization.

1109403185618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095621921.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 1109403185618 in words is "one trillion, one hundred nine billion, four hundred three million, one hundred eighty-five thousand, six hundred eighteen".