128207681285171 has 8 divisors (see below), whose sum is σ = 129530387222544. Its totient is φ = 126884995292160.

The previous prime is 128207681285107. The next prime is 128207681285197. The reversal of 128207681285171 is 171582186702821.

It is a happy number.

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 128207681285171 - 2⁶ = 128207681285107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128207681285171.

It is not an unprimeable number, because it can be changed into a prime (128207651285171) 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, 8113376 + ... + 17951106.

It is an arithmetic number, because the mean of its divisors is an integer number (16191298402818).

Almost surely, 2^{128207681285171} is an apocalyptic number.

128207681285171 is a deficient number, since it is larger than the sum of its proper divisors (1322705937373).

128207681285171 is an equidigital number, since it uses as much as digits as its factorization.

128207681285171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9972181.

The product of its (nonzero) digits is 6021120, while the sum is 59.

The spelling of 128207681285171 in words is "one hundred twenty-eight trillion, two hundred seven billion, six hundred eighty-one million, two hundred eighty-five thousand, one hundred seventy-one".