2640736811 has 2 divisors, whose sum is σ = 2640736812. Its totient is φ = 2640736810.

The previous prime is 2640736807. The next prime is 2640736817. The reversal of 2640736811 is 1186370462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2640736811 - 2² = 2640736807 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640736817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320368405 + 1320368406.

It is an arithmetic number, because the mean of its divisors is an integer number (1320368406).

Almost surely, 2^2640736811 is an apocalyptic number.

2640736811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640736811 is an equidigital number, since it uses as much as digits as its factorization.

2640736811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2640736811 is about 51388.0998967660. The cubic root of 2640736811 is about 1382.2132117153.

The spelling of 2640736811 in words is "two billion, six hundred forty million, seven hundred thirty-six thousand, eight hundred eleven".