25530666000565 has 32 divisors (see below), whose sum is σ = 33531669956736. Its totient is φ = 18506819036160.

The previous prime is 25530666000563. The next prime is 25530666000611. The reversal of 25530666000565 is 56500066603552.

It is not a de Polignac number, because 25530666000565 - 2¹ = 25530666000563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530666000563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218520454 + ... + 218637256.

It is an arithmetic number, because the mean of its divisors is an integer number (1047864686148).

Almost surely, 2^{25530666000565} is an apocalyptic number.

It is an amenable number.

25530666000565 is a deficient number, since it is larger than the sum of its proper divisors (8001003956171).

25530666000565 is a wasteful number, since it uses less digits than its factorization.

25530666000565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129829.

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 25530666000565 in words is "twenty-five trillion, five hundred thirty billion, six hundred sixty-six million, five hundred sixty-five", and thus it is an aban number.