6781568285 has 16 divisors (see below), whose sum is σ = 8494706304. Its totient is φ = 5187538752.

The previous prime is 6781568281. The next prime is 6781568291. The reversal of 6781568285 is 5828651876.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6781568285 - 2² = 6781568281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6781568285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781568281) 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, 379154 + ... + 396636.

It is an arithmetic number, because the mean of its divisors is an integer number (530919144).

Almost surely, 2^6781568285 is an apocalyptic number.

It is an amenable number.

6781568285 is a deficient number, since it is larger than the sum of its proper divisors (1713138019).

6781568285 is a wasteful number, since it uses less digits than its factorization.

6781568285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20884.

The product of its digits is 6451200, while the sum is 56.

The square root of 6781568285 is about 82350.2779898162. The cubic root of 6781568285 is about 1892.8231824940.

The spelling of 6781568285 in words is "six billion, seven hundred eighty-one million, five hundred sixty-eight thousand, two hundred eighty-five".