12555650553565 has 32 divisors (see below), whose sum is σ = 17981650100736. Its totient is φ = 8228928364800.

The previous prime is 12555650553541. The next prime is 12555650553623. The reversal of 12555650553565 is 56535505655521.

It is not a de Polignac number, because 12555650553565 - 2³³ = 12547060618973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4946962 + ... + 7041571.

It is an arithmetic number, because the mean of its divisors is an integer number (561926565648).

Almost surely, 2^{12555650553565} is an apocalyptic number.

It is an amenable number.

12555650553565 is a deficient number, since it is larger than the sum of its proper divisors (5425999547171).

12555650553565 is a wasteful number, since it uses less digits than its factorization.

12555650553565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989869.

The product of its (nonzero) digits is 84375000, while the sum is 58.

The spelling of 12555650553565 in words is "twelve trillion, five hundred fifty-five billion, six hundred fifty million, five hundred fifty-three thousand, five hundred sixty-five".