2641866811 has 2 divisors, whose sum is σ = 2641866812. Its totient is φ = 2641866810.

The previous prime is 2641866767. The next prime is 2641866863. The reversal of 2641866811 is 1186681462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2641866811 - 2¹⁹ = 2641342523 is a prime.

It is not a weakly prime, because it can be changed into another prime (2641864811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320933405 + 1320933406.

It is an arithmetic number, because the mean of its divisors is an integer number (1320933406).

Almost surely, 2^2641866811 is an apocalyptic number.

2641866811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641866811 is an equidigital number, since it uses as much as digits as its factorization.

2641866811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 2641866811 is about 51399.0934842240. The cubic root of 2641866811 is about 1382.4103382888.

The spelling of 2641866811 in words is "two billion, six hundred forty-one million, eight hundred sixty-six thousand, eight hundred eleven".