2565631320325 has 12 divisors (see below), whose sum is σ = 3224963426308. Its totient is φ = 2024388547200.

The previous prime is 2565631320311. The next prime is 2565631320377. The reversal of 2565631320325 is 5230231365652.

It can be written as a sum of positive squares in 6 ways, for example, as 298516898689 + 2267114421636 = 546367^2 + 1505694^2 .

It is not a de Polignac number, because 2565631320325 - 2²³ = 2565622931717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 702910866 + ... + 702914515.

Almost surely, 2^{2565631320325} is an apocalyptic number.

2565631320325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565631320325 is a deficient number, since it is larger than the sum of its proper divisors (659332105983).

2565631320325 is a wasteful number, since it uses less digits than its factorization.

2565631320325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405825464 (or 1405825459 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 43.

Adding to 2565631320325 its reverse (5230231365652), we get a palindrome (7795862685977).

The spelling of 2565631320325 in words is "two trillion, five hundred sixty-five billion, six hundred thirty-one million, three hundred twenty thousand, three hundred twenty-five".