2565026291 has 2 divisors, whose sum is σ = 2565026292. Its totient is φ = 2565026290.

The previous prime is 2565026281. The next prime is 2565026327. The reversal of 2565026291 is 1926205652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2565026291 - 2²⁶ = 2497917427 is a prime.

It is not a weakly prime, because it can be changed into another prime (2565026281) 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, 1282513145 + 1282513146.

It is an arithmetic number, because the mean of its divisors is an integer number (1282513146).

Almost surely, 2^2565026291 is an apocalyptic number.

2565026291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565026291 is an equidigital number, since it uses as much as digits as its factorization.

2565026291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 2565026291 is about 50646.0886051430. The cubic root of 2565026291 is about 1368.8754675308.

The spelling of 2565026291 in words is "two billion, five hundred sixty-five million, twenty-six thousand, two hundred ninety-one".