2565730775 has 48 divisors (see below), whose sum is σ = 3417236640. Its totient is φ = 1907136000.

The previous prime is 2565730771. The next prime is 2565730787. The reversal of 2565730775 is 5770375652.

It is not a de Polignac number, because 2565730775 - 2² = 2565730771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565730771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2708852 + ... + 2709798.

It is an arithmetic number, because the mean of its divisors is an integer number (71192430).

Almost surely, 2^2565730775 is an apocalyptic number.

2565730775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2565730775 is a deficient number, since it is larger than the sum of its proper divisors (851505865).

2565730775 is a wasteful number, since it uses less digits than its factorization.

2565730775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 1543500, while the sum is 47.

The square root of 2565730775 is about 50653.0430971329. The cubic root of 2565730775 is about 1369.0007765248. Note that the first 3 decimals are identical.

The spelling of 2565730775 in words is "two billion, five hundred sixty-five million, seven hundred thirty thousand, seven hundred seventy-five".