109826561 has 4 divisors (see below), whose sum is σ = 118274772. Its totient is φ = 101378352.

The previous prime is 109826551. The next prime is 109826569. The reversal of 109826561 is 165628901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6682225 + 103144336 = 2585^2 + 10156^2 .

It is a cyclic number.

It is not a de Polignac number, because 109826561 - 2¹⁸ = 109564417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109826569) 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 3 ways as a sum of consecutive naturals, for example, 4224086 + ... + 4224111.

It is an arithmetic number, because the mean of its divisors is an integer number (29568693).

Almost surely, 2^109826561 is an apocalyptic number.

It is an amenable number.

109826561 is a deficient number, since it is larger than the sum of its proper divisors (8448211).

109826561 is an equidigital number, since it uses as much as digits as its factorization.

109826561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8448210.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 109826561 is about 10479.8168400025. The cubic root of 109826561 is about 478.8900292782.

The spelling of 109826561 in words is "one hundred nine million, eight hundred twenty-six thousand, five hundred sixty-one".