2565097539 has 8 divisors (see below), whose sum is σ = 3420655440. Its totient is φ = 1709802336.

The previous prime is 2565097537. The next prime is 2565097543. The reversal of 2565097539 is 9357905652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2565097539 - 2¹ = 2565097537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2565097491 and 2565097500.

It is not an unprimeable number, because it can be changed into a prime (2565097537) 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, 41632 + ... + 82845.

It is an arithmetic number, because the mean of its divisors is an integer number (427581930).

Almost surely, 2^2565097539 is an apocalyptic number.

2565097539 is a deficient number, since it is larger than the sum of its proper divisors (855557901).

2565097539 is a wasteful number, since it uses less digits than its factorization.

2565097539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131349.

The product of its (nonzero) digits is 2551500, while the sum is 51.

The square root of 2565097539 is about 50646.7919912012. The cubic root of 2565097539 is about 1368.8881417006. Note that the first 3 decimals are identical.

The spelling of 2565097539 in words is "two billion, five hundred sixty-five million, ninety-seven thousand, five hundred thirty-nine".