2565239411 has 16 divisors (see below), whose sum is σ = 2967744000. Its totient is φ = 2171855808.

The previous prime is 2565239387. The next prime is 2565239423. The reversal of 2565239411 is 1149325652.

It is a cyclic number.

It is not a de Polignac number, because 2565239411 - 2¹⁰ = 2565238387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565239441) 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 in 15 ways as a sum of consecutive naturals, for example, 290540 + ... + 299238.

It is an arithmetic number, because the mean of its divisors is an integer number (185484000).

Almost surely, 2^2565239411 is an apocalyptic number.

2565239411 is a deficient number, since it is larger than the sum of its proper divisors (402504589).

2565239411 is a wasteful number, since it uses less digits than its factorization.

2565239411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9218.

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

The square root of 2565239411 is about 50648.1925738718. The cubic root of 2565239411 is about 1368.9133783392.

The spelling of 2565239411 in words is "two billion, five hundred sixty-five million, two hundred thirty-nine thousand, four hundred eleven".