6851845611729 has 6 divisors (see below), whose sum is σ = 9897110328066. Its totient is φ = 4567897074480.

The previous prime is 6851845611683. The next prime is 6851845611811. The reversal of 6851845611729 is 9271165481586.

6851845611729 is a `hidden beast` number, since 6 + 8 + 5 + 1 + 8 + 4 + 5 + 611 + 7 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3532351097025 + 3319494514704 = 1879455^2 + 1821948^2 .

It is not a de Polignac number, because 6851845611729 - 2¹¹ = 6851845609681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6851845611629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 380658089532 + ... + 380658089549.

It is an arithmetic number, because the mean of its divisors is an integer number (1649518388011).

Almost surely, 2^{6851845611729} is an apocalyptic number.

It is an amenable number.

6851845611729 is a deficient number, since it is larger than the sum of its proper divisors (3045264716337).

6851845611729 is a wasteful number, since it uses less digits than its factorization.

6851845611729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761316179087 (or 761316179084 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 63.

The spelling of 6851845611729 in words is "six trillion, eight hundred fifty-one billion, eight hundred forty-five million, six hundred eleven thousand, seven hundred twenty-nine".