6809346547649 has 4 divisors (see below), whose sum is σ = 6876765820500. Its totient is φ = 6741927274800.

The previous prime is 6809346547609. The next prime is 6809346547687. The reversal of 6809346547649 is 9467456439086.

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 3394216675600 + 3415129872049 = 1842340^2 + 1848007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6809346547649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6809346547609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33709636274 + ... + 33709636475.

It is an arithmetic number, because the mean of its divisors is an integer number (1719191455125).

Almost surely, 2^{6809346547649} is an apocalyptic number.

It is an amenable number.

6809346547649 is a deficient number, since it is larger than the sum of its proper divisors (67419272851).

6809346547649 is a wasteful number, since it uses less digits than its factorization.

6809346547649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67419272850.

The product of its (nonzero) digits is 940584960, while the sum is 71.

The spelling of 6809346547649 in words is "six trillion, eight hundred nine billion, three hundred forty-six million, five hundred forty-seven thousand, six hundred forty-nine".