109885665 has 16 divisors (see below), whose sum is σ = 176024448. Its totient is φ = 58536576.

The previous prime is 109885663. The next prime is 109885691. The reversal of 109885665 is 566588901.

It is not a de Polignac number, because 109885665 - 2¹ = 109885663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109885663) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10452 + ... + 18138.

It is an arithmetic number, because the mean of its divisors is an integer number (11001528).

Almost surely, 2^109885665 is an apocalyptic number.

109885665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109885665 is a deficient number, since it is larger than the sum of its proper divisors (66138783).

109885665 is an equidigital number, since it uses as much as digits as its factorization.

109885665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648.

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 109885665 is about 10482.6363573292. The cubic root of 109885665 is about 478.9759199776.

It can be divided in two parts, 10988 and 5665, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 109885665 in words is "one hundred nine million, eight hundred eighty-five thousand, six hundred sixty-five".