2565766561336 has 32 divisors (see below), whose sum is σ = 5248229255280. Its totient is φ = 1166241888000.

The previous prime is 2565766561333. The next prime is 2565766561367. The reversal of 2565766561336 is 6331656675652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565766561333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8680786 + ... + 8971486.

Almost surely, 2^{2565766561336} is an apocalyptic number.

It is an amenable number.

2565766561336 is an abundant number, since it is smaller than the sum of its proper divisors (2682462693944).

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

2565766561336 is a wasteful number, since it uses less digits than its factorization.

2565766561336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391015 (or 391011 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 61.

The spelling of 2565766561336 in words is "two trillion, five hundred sixty-five billion, seven hundred sixty-six million, five hundred sixty-one thousand, three hundred thirty-six".