2565411538 has 4 divisors (see below), whose sum is σ = 3848117310. Its totient is φ = 1282705768.

The previous prime is 2565411517. The next prime is 2565411551. The reversal of 2565411538 is 8351145652.

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

It can be written as a sum of positive squares in only one way, i.e., 2510310609 + 55100929 = 50103^2 + 7423^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2565411538.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641352883 + ... + 641352886.

Almost surely, 2^2565411538 is an apocalyptic number.

2565411538 is a deficient number, since it is larger than the sum of its proper divisors (1282705772).

2565411538 is a wasteful number, since it uses less digits than its factorization.

2565411538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282705771.

The product of its digits is 144000, while the sum is 40.

The square root of 2565411538 is about 50649.8917866564. The cubic root of 2565411538 is about 1368.9439955832.

The spelling of 2565411538 in words is "two billion, five hundred sixty-five million, four hundred eleven thousand, five hundred thirty-eight".