128755978289287 has 8 divisors (see below), whose sum is σ = 130281688753920. Its totient is φ = 127238492679480.

The previous prime is 128755978289233. The next prime is 128755978289381. The reversal of 128755978289287 is 782982879557821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128755978289287 - 2¹¹ = 128755978287239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128755978289198 and 128755978289207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128755973289287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056182213 + ... + 2056244830.

It is an arithmetic number, because the mean of its divisors is an integer number (16285211094240).

Almost surely, 2^{128755978289287} is an apocalyptic number.

128755978289287 is a deficient number, since it is larger than the sum of its proper divisors (1525710464633).

128755978289287 is a wasteful number, since it uses less digits than its factorization.

128755978289287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112427413.

The product of its digits is 22759833600, while the sum is 88.

The spelling of 128755978289287 in words is "one hundred twenty-eight trillion, seven hundred fifty-five billion, nine hundred seventy-eight million, two hundred eighty-nine thousand, two hundred eighty-seven".