2108826805 has 8 divisors (see below), whose sum is σ = 2578339512. Its totient is φ = 1655229888.

The previous prime is 2108826781. The next prime is 2108826817. The reversal of 2108826805 is 5086288012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 693110929 + 1415715876 = 26327^2 + 37626^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2108826805 - 2¹⁹ = 2108302517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3978654 + ... + 3979183.

It is an arithmetic number, because the mean of its divisors is an integer number (322292439).

Almost surely, 2^2108826805 is an apocalyptic number.

It is an amenable number.

2108826805 is a deficient number, since it is larger than the sum of its proper divisors (469512707).

2108826805 is an equidigital number, since it uses as much as digits as its factorization.

2108826805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7957895.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 2108826805 is about 45921.9642981439. The cubic root of 2108826805 is about 1282.3708510912.

The spelling of 2108826805 in words is "two billion, one hundred eight million, eight hundred twenty-six thousand, eight hundred five".