11388111865618 has 16 divisors (see below), whose sum is σ = 17633287816704. Its totient is φ = 5510350975680.

The previous prime is 11388111865609. The next prime is 11388111865643. The reversal of 11388111865618 is 81656811188311.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 25351546 + ... + 25796842.

It is an arithmetic number, because the mean of its divisors is an integer number (1102080488544).

Almost surely, 2^{11388111865618} is an apocalyptic number.

11388111865618 is a deficient number, since it is larger than the sum of its proper divisors (6245175951086).

11388111865618 is a wasteful number, since it uses less digits than its factorization.

11388111865618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857817.

The product of its digits is 2211840, while the sum is 58.

The spelling of 11388111865618 in words is "eleven trillion, three hundred eighty-eight billion, one hundred eleven million, eight hundred sixty-five thousand, six hundred eighteen".