128706583405085 has 8 divisors (see below), whose sum is σ = 176511885812736. Its totient is φ = 88255942906320.

The previous prime is 128706583405073. The next prime is 128706583405087. The reversal of 128706583405085 is 580504385607821.

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

It is not a de Polignac number, because 128706583405085 - 2⁴ = 128706583405069 is a prime.

It is a super-2 number, since 2×128706583405085² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128706583405087) 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, 1838665477181 + ... + 1838665477250.

It is an arithmetic number, because the mean of its divisors is an integer number (22063985726592).

Almost surely, 2^{128706583405085} is an apocalyptic number.

It is an amenable number.

128706583405085 is a deficient number, since it is larger than the sum of its proper divisors (47805302407651).

128706583405085 is an equidigital number, since it uses as much as digits as its factorization.

128706583405085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677330954443.

The product of its (nonzero) digits is 64512000, while the sum is 62.

The spelling of 128706583405085 in words is "one hundred twenty-eight trillion, seven hundred six billion, five hundred eighty-three million, four hundred five thousand, eighty-five".