2011644511 has 2 divisors, whose sum is σ = 2011644512. Its totient is φ = 2011644510.

The previous prime is 2011644473. The next prime is 2011644517. The reversal of 2011644511 is 1154461102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011644511 - 2¹¹ = 2011642463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011644517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005822255 + 1005822256.

It is an arithmetic number, because the mean of its divisors is an integer number (1005822256).

Almost surely, 2^2011644511 is an apocalyptic number.

2011644511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011644511 is an equidigital number, since it uses as much as digits as its factorization.

2011644511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 2011644511 is about 44851.3601911915. The cubic root of 2011644511 is about 1262.3615137579.

The spelling of 2011644511 in words is "two billion, eleven million, six hundred forty-four thousand, five hundred eleven".