2565730776 has 64 divisors (see below), whose sum is σ = 7649395200. Its totient is φ = 701192448.

The previous prime is 2565730771. The next prime is 2565730787. The reversal of 2565730776 is 6770375652.

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 15 ways as a sum of consecutive naturals, for example, 328141 + ... + 335868.

It is an arithmetic number, because the mean of its divisors is an integer number (119521800).

Almost surely, 2^2565730776 is an apocalyptic number.

It is an amenable number.

2565730776 is an abundant number, since it is smaller than the sum of its proper divisors (5083664424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565730776 is a wasteful number, since it uses less digits than its factorization.

2565730776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664048 (or 664044 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 48.

The square root of 2565730776 is about 50653.0431070039. The cubic root of 2565730776 is about 1369.0007767027. Note that the first 3 decimals are identical.

The spelling of 2565730776 in words is "two billion, five hundred sixty-five million, seven hundred thirty thousand, seven hundred seventy-six".