128620243325 has 18 divisors (see below), whose sum is σ = 185528140506. Its totient is φ = 88196737440.

The previous prime is 128620243313. The next prime is 128620243327. The reversal of 128620243325 is 523342026821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6183935044 + 122436308281 = 78638^2 + 349909^2 .

It is not a de Polignac number, because 128620243325 - 2⁴ = 128620243309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128620243327) 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 in 17 ways as a sum of consecutive naturals, for example, 52496834 + ... + 52499283.

It is an arithmetic number, because the mean of its divisors is an integer number (10307118917).

Almost surely, 2^128620243325 is an apocalyptic number.

It is an amenable number.

128620243325 is a deficient number, since it is larger than the sum of its proper divisors (56907897181).

128620243325 is a wasteful number, since it uses less digits than its factorization.

128620243325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104996141 (or 104996129 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 128620243325 in words is "one hundred twenty-eight billion, six hundred twenty million, two hundred forty-three thousand, three hundred twenty-five".