12642440553525 has 24 divisors (see below), whose sum is σ = 20921016281760. Its totient is φ = 6736554994240.

The previous prime is 12642440553521. The next prime is 12642440553541. The reversal of 12642440553525 is 52535504424621.

It is not a de Polignac number, because 12642440553525 - 2² = 12642440553521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642440553521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75915867 + ... + 76082216.

It is an arithmetic number, because the mean of its divisors is an integer number (871709011740).

Almost surely, 2^{12642440553525} is an apocalyptic number.

12642440553525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12642440553525 is a deficient number, since it is larger than the sum of its proper divisors (8278575728235).

12642440553525 is a wasteful number, since it uses less digits than its factorization.

12642440553525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151999205 (or 151999200 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 48.

The spelling of 12642440553525 in words is "twelve trillion, six hundred forty-two billion, four hundred forty million, five hundred fifty-three thousand, five hundred twenty-five".