320135311391 has 4 divisors (see below), whose sum is σ = 365868927312. Its totient is φ = 274401695472.

The previous prime is 320135311387. The next prime is 320135311411. The reversal of 320135311391 is 193113531023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193113531023 = 7 ⋅27587647289.

It is a cyclic number.

It is not a de Polignac number, because 320135311391 - 2² = 320135311387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320135314391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22866807950 + ... + 22866807963.

It is an arithmetic number, because the mean of its divisors is an integer number (91467231828).

Almost surely, 2^320135311391 is an apocalyptic number.

320135311391 is a deficient number, since it is larger than the sum of its proper divisors (45733615921).

320135311391 is an equidigital number, since it uses as much as digits as its factorization.

320135311391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45733615920.

The product of its (nonzero) digits is 7290, while the sum is 32.

The spelling of 320135311391 in words is "three hundred twenty billion, one hundred thirty-five million, three hundred eleven thousand, three hundred ninety-one".