6218656811 has 2 divisors, whose sum is σ = 6218656812. Its totient is φ = 6218656810.

The previous prime is 6218656739. The next prime is 6218656819. The reversal of 6218656811 is 1186568126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6218656811 - 2³⁰ = 5144914987 is a prime.

It is not a weakly prime, because it can be changed into another prime (6218656819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3109328405 + 3109328406.

It is an arithmetic number, because the mean of its divisors is an integer number (3109328406).

Almost surely, 2^6218656811 is an apocalyptic number.

6218656811 is a deficient number, since it is larger than the sum of its proper divisors (1).

6218656811 is an equidigital number, since it uses as much as digits as its factorization.

6218656811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 44.

The square root of 6218656811 is about 78858.4606177422. The cubic root of 6218656811 is about 1838.9314064445.

The spelling of 6218656811 in words is "six billion, two hundred eighteen million, six hundred fifty-six thousand, eight hundred eleven".