6863668549 has 2 divisors, whose sum is σ = 6863668550. Its totient is φ = 6863668548.

The previous prime is 6863668541. The next prime is 6863668589. The reversal of 6863668549 is 9458663686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3945724225 + 2917944324 = 62815^2 + 54018^2 .

It is a cyclic number.

It is not a de Polignac number, because 6863668549 - 2³ = 6863668541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6863668541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3431834274 + 3431834275.

It is an arithmetic number, because the mean of its divisors is an integer number (3431834275).

Almost surely, 2^6863668549 is an apocalyptic number.

It is an amenable number.

6863668549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6863668549 is an equidigital number, since it uses as much as digits as its factorization.

6863668549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 61.

The square root of 6863668549 is about 82847.2603590487. The cubic root of 6863668549 is about 1900.4309778570.

The spelling of 6863668549 in words is "six billion, eight hundred sixty-three million, six hundred sixty-eight thousand, five hundred forty-nine".