128372323201 has 4 divisors (see below), whose sum is σ = 129643336404. Its totient is φ = 127101310000.

The previous prime is 128372323199. The next prime is 128372323217. The reversal of 128372323201 is 102323273821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102323273821 = 101 ⋅1013101721.

It can be written as a sum of positive squares in 2 ways, for example, as 126877727601 + 1494595600 = 356199^2 + 38660^2 .

It is a cyclic number.

It is not a de Polignac number, because 128372323201 - 2¹ = 128372323199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128372723201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 635506450 + ... + 635506651.

It is an arithmetic number, because the mean of its divisors is an integer number (32410834101).

Almost surely, 2^128372323201 is an apocalyptic number.

It is an amenable number.

128372323201 is a deficient number, since it is larger than the sum of its proper divisors (1271013203).

128372323201 is a wasteful number, since it uses less digits than its factorization.

128372323201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271013202.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 128372323201 in words is "one hundred twenty-eight billion, three hundred seventy-two million, three hundred twenty-three thousand, two hundred one".