128158297345 has 16 divisors (see below), whose sum is σ = 165979254672. Its totient is φ = 94434658560.

The previous prime is 128158297339. The next prime is 128158297361. The reversal of 128158297345 is 543792851821.

It can be written as a sum of positive squares in 8 ways, for example, as 37754044416 + 90404252929 = 194304^2 + 300673^2 .

It is not a de Polignac number, because 128158297345 - 2²³ = 128149908737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2108502 + ... + 2168431.

It is an arithmetic number, because the mean of its divisors is an integer number (10373703417).

Almost surely, 2^128158297345 is an apocalyptic number.

It is an amenable number.

128158297345 is a deficient number, since it is larger than the sum of its proper divisors (37820957327).

128158297345 is a wasteful number, since it uses less digits than its factorization.

128158297345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277412.

The product of its digits is 4838400, while the sum is 55.

It can be divided in two parts, 128158 and 297345, that added together give a triangular number (425503 = T₉₂₂).

The spelling of 128158297345 in words is "one hundred twenty-eight billion, one hundred fifty-eight million, two hundred ninety-seven thousand, three hundred forty-five".