2565346447 has 4 divisors (see below), whose sum is σ = 2575100880. Its totient is φ = 2555592016.

The previous prime is 2565346397. The next prime is 2565346471. The reversal of 2565346447 is 7446435652.

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

It is a cyclic number.

It is not a de Polignac number, because 2565346447 - 2¹⁵ = 2565313679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2565346397 and 2565346406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565346477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4876822 + ... + 4877347.

It is an arithmetic number, because the mean of its divisors is an integer number (643775220).

Almost surely, 2^2565346447 is an apocalyptic number.

2565346447 is a deficient number, since it is larger than the sum of its proper divisors (9754433).

2565346447 is an equidigital number, since it uses as much as digits as its factorization.

2565346447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9754432.

The product of its digits is 2419200, while the sum is 46.

The square root of 2565346447 is about 50649.2492244456. The cubic root of 2565346447 is about 1368.9324176244.

The spelling of 2565346447 in words is "two billion, five hundred sixty-five million, three hundred forty-six thousand, four hundred forty-seven".