128942604259677 has 24 divisors (see below), whose sum is σ = 200578509671904. Its totient is φ = 79348849768224.

The previous prime is 128942604259639. The next prime is 128942604259727. The reversal of 128942604259677 is 776952406249821.

128942604259677 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 4 + 2 + 604 + 2 + 5 + 9 + 6 + 7 + 7 = 666.

It is not a de Polignac number, because 128942604259677 - 2¹⁶ = 128942604194141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128942604255677) 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, 18494178 + ... + 24493260.

It is an arithmetic number, because the mean of its divisors is an integer number (8357437902996).

Almost surely, 2^{128942604259677} is an apocalyptic number.

It is an amenable number.

128942604259677 is a deficient number, since it is larger than the sum of its proper divisors (71635905412227).

128942604259677 is a wasteful number, since it uses less digits than its factorization.

128942604259677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182809 (or 6182806 counting only the distinct ones).

The product of its (nonzero) digits is 731566080, while the sum is 72.

The spelling of 128942604259677 in words is "one hundred twenty-eight trillion, nine hundred forty-two billion, six hundred four million, two hundred fifty-nine thousand, six hundred seventy-seven".