3645645811 has 2 divisors, whose sum is σ = 3645645812. Its totient is φ = 3645645810.

The previous prime is 3645645799. The next prime is 3645645827. The reversal of 3645645811 is 1185465463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3645645811 - 2⁷ = 3645645683 is a prime.

It is not a weakly prime, because it can be changed into another prime (3645640811) 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, 1822822905 + 1822822906.

It is an arithmetic number, because the mean of its divisors is an integer number (1822822906).

Almost surely, 2^3645645811 is an apocalyptic number.

3645645811 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645645811 is an equidigital number, since it uses as much as digits as its factorization.

3645645811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 3645645811 is about 60379.1835900420. The cubic root of 3645645811 is about 1539.0692372816.

The spelling of 3645645811 in words is "three billion, six hundred forty-five million, six hundred forty-five thousand, eight hundred eleven".