2681806709 has 8 divisors (see below), whose sum is σ = 2728749120. Its totient is φ = 2634914016.

The previous prime is 2681806703. The next prime is 2681806727. The reversal of 2681806709 is 9076081862.

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 2681806709 - 2⁸ = 2681806453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681806703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106184 + ... + 128990.

It is an arithmetic number, because the mean of its divisors is an integer number (341093640).

Almost surely, 2^2681806709 is an apocalyptic number.

It is an amenable number.

2681806709 is a deficient number, since it is larger than the sum of its proper divisors (46942411).

2681806709 is a wasteful number, since it uses less digits than its factorization.

2681806709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24859.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 2681806709 is about 51786.1632967726. The cubic root of 2681806709 is about 1389.3419774168.

The spelling of 2681806709 in words is "two billion, six hundred eighty-one million, eight hundred six thousand, seven hundred nine".