2565661411 has 2 divisors, whose sum is σ = 2565661412. Its totient is φ = 2565661410.

The previous prime is 2565661393. The next prime is 2565661421. The reversal of 2565661411 is 1141665652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2565661411 - 2⁷ = 2565661283 is a prime.

It is not a weakly prime, because it can be changed into another prime (2565661421) 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, 1282830705 + 1282830706.

It is an arithmetic number, because the mean of its divisors is an integer number (1282830706).

Almost surely, 2^2565661411 is an apocalyptic number.

2565661411 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565661411 is an equidigital number, since it uses as much as digits as its factorization.

2565661411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 2565661411 is about 50652.3583952416. The cubic root of 2565661411 is about 1368.9884395295.

The spelling of 2565661411 in words is "two billion, five hundred sixty-five million, six hundred sixty-one thousand, four hundred eleven".