2565266533 has 8 divisors (see below), whose sum is σ = 2620657152. Its totient is φ = 2509909776.

The previous prime is 2565266531. The next prime is 2565266563. The reversal of 2565266533 is 3356625652.

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

It is a cyclic number.

It is not a de Polignac number, because 2565266533 - 2¹ = 2565266531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565266533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565266531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198516 + ... + 211042.

It is an arithmetic number, because the mean of its divisors is an integer number (327582144).

Almost surely, 2^2565266533 is an apocalyptic number.

It is an amenable number.

2565266533 is a deficient number, since it is larger than the sum of its proper divisors (55390619).

2565266533 is a wasteful number, since it uses less digits than its factorization.

2565266533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16931.

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

The square root of 2565266533 is about 50648.4603221065. The cubic root of 2565266533 is about 1368.9182027801.

The spelling of 2565266533 in words is "two billion, five hundred sixty-five million, two hundred sixty-six thousand, five hundred thirty-three".