12135054553525 has 24 divisors (see below), whose sum is σ = 15393197522304. Its totient is φ = 9485679504000.

The previous prime is 12135054553519. The next prime is 12135054553529. The reversal of 12135054553525 is 52535545053121.

It is not a de Polignac number, because 12135054553525 - 2¹³ = 12135054545333 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 (12135054553529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7885927 + ... + 9298276.

It is an arithmetic number, because the mean of its divisors is an integer number (641383230096).

Almost surely, 2^{12135054553525} is an apocalyptic number.

It is an amenable number.

12135054553525 is a deficient number, since it is larger than the sum of its proper divisors (3258142968779).

12135054553525 is a wasteful number, since it uses less digits than its factorization.

12135054553525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17184861 (or 17184856 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 46.

The spelling of 12135054553525 in words is "twelve trillion, one hundred thirty-five billion, fifty-four million, five hundred fifty-three thousand, five hundred twenty-five".