1111978144 has 24 divisors (see below), whose sum is σ = 2220045408. Its totient is φ = 548157120.

The previous prime is 1111978139. The next prime is 1111978159. The reversal of 1111978144 is 4418791111.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242442 + ... + 246985.

It is an arithmetic number, because the mean of its divisors is an integer number (92501892).

Almost surely, 2^1111978144 is an apocalyptic number.

It is an amenable number.

1111978144 is a deficient number, since it is larger than the sum of its proper divisors (1108067264).

1111978144 is an equidigital number, since it uses as much as digits as its factorization.

1111978144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489508 (or 489500 counting only the distinct ones).

The product of its digits is 8064, while the sum is 37.

The square root of 1111978144 is about 33346.3362905132. The cubic root of 1111978144 is about 1036.0135058838.

The spelling of 1111978144 in words is "one billion, one hundred eleven million, nine hundred seventy-eight thousand, one hundred forty-four".