128518646942727 has 12 divisors (see below), whose sum is σ = 186580370691000. Its totient is φ = 85244178681648.

The previous prime is 128518646942669. The next prime is 128518646942729. The reversal of 128518646942727 is 727249646815821.

128518646942727 is a `hidden beast` number, since 1 + 2 + 8 + 51 + 8 + 6 + 469 + 42 + 72 + 7 = 666.

It is not a de Polignac number, because 128518646942727 - 2¹² = 128518646938631 is a prime.

It is a super-3 number, since 3×128518646942727³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128518646942729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36243271477 + ... + 36243275022.

It is an arithmetic number, because the mean of its divisors is an integer number (15548364224250).

Almost surely, 2^{128518646942727} is an apocalyptic number.

128518646942727 is a deficient number, since it is larger than the sum of its proper divisors (58061723748273).

128518646942727 is a wasteful number, since it uses less digits than its factorization.

128518646942727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72486546702 (or 72486546699 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 72.

The spelling of 128518646942727 in words is "one hundred twenty-eight trillion, five hundred eighteen billion, six hundred forty-six million, nine hundred forty-two thousand, seven hundred twenty-seven".