320011230509 has 2 divisors, whose sum is σ = 320011230510. Its totient is φ = 320011230508.

The previous prime is 320011230431. The next prime is 320011230523. The reversal of 320011230509 is 905032110023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305903017225 + 14108213284 = 553085^2 + 118778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320011230509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320011230559) 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 as a sum of consecutive naturals, namely, 160005615254 + 160005615255.

It is an arithmetic number, because the mean of its divisors is an integer number (160005615255).

Almost surely, 2^320011230509 is an apocalyptic number.

It is an amenable number.

320011230509 is a deficient number, since it is larger than the sum of its proper divisors (1).

320011230509 is an equidigital number, since it uses as much as digits as its factorization.

320011230509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The spelling of 320011230509 in words is "three hundred twenty billion, eleven million, two hundred thirty thousand, five hundred nine".