2011565687 has 2 divisors, whose sum is σ = 2011565688. Its totient is φ = 2011565686.

The previous prime is 2011565669. The next prime is 2011565693. The reversal of 2011565687 is 7865651102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011565687 - 2²⁰ = 2010517111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011565287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005782843 + 1005782844.

It is an arithmetic number, because the mean of its divisors is an integer number (1005782844).

Almost surely, 2^2011565687 is an apocalyptic number.

2011565687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011565687 is an equidigital number, since it uses as much as digits as its factorization.

2011565687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 2011565687 is about 44850.4814578394. The cubic root of 2011565687 is about 1262.3450254762.

The spelling of 2011565687 in words is "two billion, eleven million, five hundred sixty-five thousand, six hundred eighty-seven".