2565730774 has 4 divisors (see below), whose sum is σ = 3848596164. Its totient is φ = 1282865386.

The previous prime is 2565730771. The next prime is 2565730787. The reversal of 2565730774 is 4770375652.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641432692 + ... + 641432695.

It is an arithmetic number, because the mean of its divisors is an integer number (962149041).

Almost surely, 2^2565730774 is an apocalyptic number.

2565730774 is a deficient number, since it is larger than the sum of its proper divisors (1282865390).

2565730774 is a wasteful number, since it uses less digits than its factorization.

2565730774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282865389.

The product of its (nonzero) digits is 1234800, while the sum is 46.

The square root of 2565730774 is about 50653.0430872618. The cubic root of 2565730774 is about 1369.0007763469. Note that the first 3 decimals are identical.

The spelling of 2565730774 in words is "two billion, five hundred sixty-five million, seven hundred thirty thousand, seven hundred seventy-four".