1115945568 has 144 divisors (see below), whose sum is σ = 3250630656. Its totient is φ = 363052800.

The previous prime is 1115945539. The next prime is 1115945573. The reversal of 1115945568 is 8655495111.

1115945568 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 94 + 556 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2913505 + ... + 2913887.

It is an arithmetic number, because the mean of its divisors is an integer number (22573824).

Almost surely, 2^1115945568 is an apocalyptic number.

1115945568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115945568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625315328).

1115945568 is an abundant number, since it is smaller than the sum of its proper divisors (2134685088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115945568 is a wasteful number, since it uses less digits than its factorization.

1115945568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 606 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The square root of 1115945568 is about 33405.7714773959. The cubic root of 1115945568 is about 1037.2441733971.

The spelling of 1115945568 in words is "one billion, one hundred fifteen million, nine hundred forty-five thousand, five hundred sixty-eight".