6806615517869 has 2 divisors, whose sum is σ = 6806615517870. Its totient is φ = 6806615517868.

The previous prime is 6806615517839. The next prime is 6806615517901. The reversal of 6806615517869 is 9687155166086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3618383862025 + 3188231655844 = 1902205^2 + 1785562^2 .

It is a cyclic number.

It is not a de Polignac number, because 6806615517869 - 2²⁴ = 6806598740653 is a prime.

It is a super-2 number, since 2×6806615517869² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6806615517799 and 6806615517808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6806615517839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3403307758934 + 3403307758935.

It is an arithmetic number, because the mean of its divisors is an integer number (3403307758935).

Almost surely, 2^{6806615517869} is an apocalyptic number.

It is an amenable number.

6806615517869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6806615517869 is an equidigital number, since it uses as much as digits as its factorization.

6806615517869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 130636800, while the sum is 68.

The spelling of 6806615517869 in words is "six trillion, eight hundred six billion, six hundred fifteen million, five hundred seventeen thousand, eight hundred sixty-nine".