128255040726441 has 4 divisors (see below), whose sum is σ = 171006720968592. Its totient is φ = 85503360484292.

The previous prime is 128255040726413. The next prime is 128255040726487. The reversal of 128255040726441 is 144627040552821.

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 a cyclic number.

It is not a de Polignac number, because 128255040726441 - 2⁷ = 128255040726313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128255040726941) 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, 21375840121071 + ... + 21375840121076.

It is an arithmetic number, because the mean of its divisors is an integer number (42751680242148).

Almost surely, 2^{128255040726441} is an apocalyptic number.

It is an amenable number.

128255040726441 is a deficient number, since it is larger than the sum of its proper divisors (42751680242151).

128255040726441 is an equidigital number, since it uses as much as digits as its factorization.

128255040726441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42751680242150.

The product of its (nonzero) digits is 4300800, while the sum is 51.

The spelling of 128255040726441 in words is "one hundred twenty-eight trillion, two hundred fifty-five billion, forty million, seven hundred twenty-six thousand, four hundred forty-one".