12557013566444 has 24 divisors (see below), whose sum is σ = 22313173439088. Its totient is φ = 6181908701760.

The previous prime is 12557013566431. The next prime is 12557013566579. The reversal of 12557013566444 is 44466531075521.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10368419 + ... + 11515994.

It is an arithmetic number, because the mean of its divisors is an integer number (929715559962).

Almost surely, 2^{12557013566444} is an apocalyptic number.

It is an amenable number.

12557013566444 is a deficient number, since it is larger than the sum of its proper divisors (9756159872644).

12557013566444 is a wasteful number, since it uses less digits than its factorization.

12557013566444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21886625 (or 21886623 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 12557013566444 in words is "twelve trillion, five hundred fifty-seven billion, thirteen million, five hundred sixty-six thousand, four hundred forty-four".