109115565 has 32 divisors (see below), whose sum is σ = 196197120. Its totient is φ = 51380736.

The previous prime is 109115549. The next prime is 109115579. The reversal of 109115565 is 565511901.

It is not a de Polignac number, because 109115565 - 2⁴ = 109115549 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 7680 + ... + 16649.

It is an arithmetic number, because the mean of its divisors is an integer number (6131160).

Almost surely, 2^109115565 is an apocalyptic number.

109115565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109115565 is a deficient number, since it is larger than the sum of its proper divisors (87081555).

109115565 is a wasteful number, since it uses less digits than its factorization.

109115565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24373.

The product of its (nonzero) digits is 6750, while the sum is 33.

The square root of 109115565 is about 10445.8396024446. The cubic root of 109115565 is about 477.8543772484.

The spelling of 109115565 in words is "one hundred nine million, one hundred fifteen thousand, five hundred sixty-five".