2605256111 has 4 divisors (see below), whose sum is σ = 2605366824. Its totient is φ = 2605145400.

The previous prime is 2605256083. The next prime is 2605256113. The reversal of 2605256111 is 1116525062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2605256111 - 2¹⁴ = 2605239727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605256113) 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 3 ways as a sum of consecutive naturals, for example, 4460 + ... + 72321.

It is an arithmetic number, because the mean of its divisors is an integer number (651341706).

Almost surely, 2^2605256111 is an apocalyptic number.

2605256111 is a deficient number, since it is larger than the sum of its proper divisors (110713).

2605256111 is an equidigital number, since it uses as much as digits as its factorization.

2605256111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110712.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2605256111 is about 51041.7095227031. The cubic root of 2605256111 is about 1375.9948478081.

The spelling of 2605256111 in words is "two billion, six hundred five million, two hundred fifty-six thousand, one hundred eleven".