6841865111009 has 2 divisors, whose sum is σ = 6841865111010. Its totient is φ = 6841865111008.

The previous prime is 6841865110961. The next prime is 6841865111063. The reversal of 6841865111009 is 9001115681486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6735166848400 + 106698262609 = 2595220^2 + 326647^2 .

It is a cyclic number.

It is not a de Polignac number, because 6841865111009 - 2⁸ = 6841865110753 is a prime.

It is a super-2 number, since 2×6841865111009² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6841865111509) 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 as a sum of consecutive naturals, namely, 3420932555504 + 3420932555505.

It is an arithmetic number, because the mean of its divisors is an integer number (3420932555505).

Almost surely, 2^{6841865111009} is an apocalyptic number.

It is an amenable number.

6841865111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6841865111009 is an equidigital number, since it uses as much as digits as its factorization.

6841865111009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 50.

The spelling of 6841865111009 in words is "six trillion, eight hundred forty-one billion, eight hundred sixty-five million, one hundred eleven thousand, nine".