128642245331 has 2 divisors, whose sum is σ = 128642245332. Its totient is φ = 128642245330.

The previous prime is 128642245313. The next prime is 128642245337. The reversal of 128642245331 is 133542246821.

Together with previous prime (128642245313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128642245331 - 2¹⁰ = 128642244307 is a prime.

It is a super-2 number, since 2×128642245331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128642245337) by changing a digit.

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 as a sum of consecutive naturals, namely, 64321122665 + 64321122666.

It is an arithmetic number, because the mean of its divisors is an integer number (64321122666).

Almost surely, 2^128642245331 is an apocalyptic number.

128642245331 is a deficient number, since it is larger than the sum of its proper divisors (1).

128642245331 is an equidigital number, since it uses as much as digits as its factorization.

128642245331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 41.

The spelling of 128642245331 in words is "one hundred twenty-eight billion, six hundred forty-two million, two hundred forty-five thousand, three hundred thirty-one".