1091055568 has 20 divisors (see below), whose sum is σ = 2119819680. Its totient is φ = 544005344.

The previous prime is 1091055503. The next prime is 1091055583. The reversal of 1091055568 is 8655501901.

It is a self number, because there is not a number n which added to its sum of digits gives 1091055568.

It is a congruent number.

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, 89230 + ... + 100717.

It is an arithmetic number, because the mean of its divisors is an integer number (105990984).

Almost surely, 2^1091055568 is an apocalyptic number.

It is an amenable number.

1091055568 is a deficient number, since it is larger than the sum of its proper divisors (1028764112).

1091055568 is a wasteful number, since it uses less digits than its factorization.

1091055568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190314 (or 190308 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 1091055568 is about 33031.1302864434. The cubic root of 1091055568 is about 1029.4745703551.

The spelling of 1091055568 in words is "one billion, ninety-one million, fifty-five thousand, five hundred sixty-eight".