1109565798 has 16 divisors (see below), whose sum is σ = 2420870976. Its totient is φ = 336232040.

The previous prime is 1109565767. The next prime is 1109565799. The reversal of 1109565798 is 8975659011.

It is a super-2 number, since 2×1109565798² = 2462272520182753608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1109565798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109565799) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8405736 + ... + 8405867.

It is an arithmetic number, because the mean of its divisors is an integer number (151304436).

Almost surely, 2^1109565798 is an apocalyptic number.

1109565798 is an abundant number, since it is smaller than the sum of its proper divisors (1311305178).

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

1109565798 is a wasteful number, since it uses less digits than its factorization.

1109565798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16811619.

The product of its (nonzero) digits is 680400, while the sum is 51.

The square root of 1109565798 is about 33310.1455715822. The cubic root of 1109565798 is about 1035.2637811646.

The spelling of 1109565798 in words is "one billion, one hundred nine million, five hundred sixty-five thousand, seven hundred ninety-eight".