115398328321 has 4 divisors (see below), whose sum is σ = 115399052500. Its totient is φ = 115397604144.

The previous prime is 115398328319. The next prime is 115398328349. The reversal of 115398328321 is 123823893511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123823893511 = 1297 ⋅95469463.

It can be written as a sum of positive squares in 2 ways, for example, as 90216129600 + 25182198721 = 300360^2 + 158689^2 .

It is a cyclic number.

It is not a de Polignac number, because 115398328321 - 2¹ = 115398328319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115398308321) 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, 6966 + ... + 480463.

It is an arithmetic number, because the mean of its divisors is an integer number (28849763125).

Almost surely, 2^115398328321 is an apocalyptic number.

It is an amenable number.

115398328321 is a deficient number, since it is larger than the sum of its proper divisors (724179).

115398328321 is an equidigital number, since it uses as much as digits as its factorization.

115398328321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724178.

The product of its digits is 311040, while the sum is 46.

The spelling of 115398328321 in words is "one hundred fifteen billion, three hundred ninety-eight million, three hundred twenty-eight thousand, three hundred twenty-one".