10805642309 has 16 divisors (see below), whose sum is σ = 13583319936. Its totient is φ = 8419973760.

The previous prime is 10805642273. The next prime is 10805642327. The reversal of 10805642309 is 90324650801.

It is a happy number.

It is not a de Polignac number, because 10805642309 - 2³² = 6510675013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10805642329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570572 + ... + 589205.

It is an arithmetic number, because the mean of its divisors is an integer number (848957496).

Almost surely, 2^10805642309 is an apocalyptic number.

It is an amenable number.

10805642309 is a deficient number, since it is larger than the sum of its proper divisors (2777677627).

10805642309 is an equidigital number, since it uses as much as digits as its factorization.

10805642309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159817 (or 1159795 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 10805642309 in words is "ten billion, eight hundred five million, six hundred forty-two thousand, three hundred nine".