12565546653 has 96 divisors (see below), whose sum is σ = 19548063360. Its totient is φ = 7166016000.

The previous prime is 12565546639. The next prime is 12565546661. The reversal of 12565546653 is 35664556521.

It is not a de Polignac number, because 12565546653 - 2⁶ = 12565546589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565546633) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80035251 + ... + 80035407.

It is an arithmetic number, because the mean of its divisors is an integer number (203625660).

Almost surely, 2^12565546653 is an apocalyptic number.

It is an amenable number.

12565546653 is a deficient number, since it is larger than the sum of its proper divisors (6982516707).

12565546653 is a wasteful number, since it uses less digits than its factorization.

12565546653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 368 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The spelling of 12565546653 in words is "twelve billion, five hundred sixty-five million, five hundred forty-six thousand, six hundred fifty-three".