128727666361044 has 72 divisors (see below), whose sum is σ = 326168797368960. Its totient is φ = 42807185798400.

The previous prime is 128727666361001. The next prime is 128727666361069. The reversal of 128727666361044 is 440163666727821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278110284 + ... + 278572764.

It is an arithmetic number, because the mean of its divisors is an integer number (4530122185680).

Almost surely, 2^{128727666361044} is an apocalyptic number.

It is an amenable number.

128727666361044 is an abundant number, since it is smaller than the sum of its proper divisors (197441131007916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128727666361044 is a wasteful number, since it uses less digits than its factorization.

128727666361044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480861 (or 480856 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 63.

The spelling of 128727666361044 in words is "one hundred twenty-eight trillion, seven hundred twenty-seven billion, six hundred sixty-six million, three hundred sixty-one thousand, forty-four".