127892991544 has 8 divisors (see below), whose sum is σ = 239799359160. Its totient is φ = 63946495768.

The previous prime is 127892991529. The next prime is 127892991571. The reversal of 127892991544 is 445199298721.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7993311964 + ... + 7993311979.

It is an arithmetic number, because the mean of its divisors is an integer number (29974919895).

Almost surely, 2^127892991544 is an apocalyptic number.

It is an amenable number.

127892991544 is a deficient number, since it is larger than the sum of its proper divisors (111906367616).

127892991544 is a wasteful number, since it uses less digits than its factorization.

127892991544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15986623949 (or 15986623945 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The spelling of 127892991544 in words is "one hundred twenty-seven billion, eight hundred ninety-two million, nine hundred ninety-one thousand, five hundred forty-four".