128568142655 has 4 divisors (see below), whose sum is σ = 154281771192. Its totient is φ = 102854514120.

The previous prime is 128568142649. The next prime is 128568142673. The reversal of 128568142655 is 556241865821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556241865821 = 220543 ⋅2522147.

It is not a de Polignac number, because 128568142655 - 2⁴ = 128568142639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128568142597 and 128568142606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12856814261 + ... + 12856814270.

It is an arithmetic number, because the mean of its divisors is an integer number (38570442798).

Almost surely, 2^128568142655 is an apocalyptic number.

128568142655 is a deficient number, since it is larger than the sum of its proper divisors (25713628537).

128568142655 is an equidigital number, since it uses as much as digits as its factorization.

128568142655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25713628536.

The product of its digits is 4608000, while the sum is 53.

The spelling of 128568142655 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, one hundred forty-two thousand, six hundred fifty-five".