128255506104801 has 4 divisors (see below), whose sum is σ = 171007341473072. Its totient is φ = 85503670736532.

The previous prime is 128255506104799. The next prime is 128255506104839. The reversal of 128255506104801 is 108401605552821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 128255506104801 - 2¹ = 128255506104799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128255006104801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21375917684131 + ... + 21375917684136.

It is an arithmetic number, because the mean of its divisors is an integer number (42751835368268).

Almost surely, 2^{128255506104801} is an apocalyptic number.

It is an amenable number.

128255506104801 is a deficient number, since it is larger than the sum of its proper divisors (42751835368271).

128255506104801 is an equidigital number, since it uses as much as digits as its factorization.

128255506104801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42751835368270.

The product of its (nonzero) digits is 768000, while the sum is 48.

The spelling of 128255506104801 in words is "one hundred twenty-eight trillion, two hundred fifty-five billion, five hundred six million, one hundred four thousand, eight hundred one".