320511523323401 has 16 divisors (see below), whose sum is σ = 327032883861840. Its totient is φ = 314007739718400.

The previous prime is 320511523323353. The next prime is 320511523323413. The reversal of 320511523323401 is 104323325115023.

It can be written as a sum of positive squares in 8 ways, for example, as 3865549210000 + 316645974113401 = 1966100^2 + 17794549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320511523323401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320511523323451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1994775695 + ... + 1994936363.

It is an arithmetic number, because the mean of its divisors is an integer number (20439555241365).

Almost surely, 2^{320511523323401} is an apocalyptic number.

It is an amenable number.

320511523323401 is a deficient number, since it is larger than the sum of its proper divisors (6521360538439).

320511523323401 is a wasteful number, since it uses less digits than its factorization.

320511523323401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215116.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 320511523323401 its reverse (104323325115023), we get a palindrome (424834848438424).

The spelling of 320511523323401 in words is "three hundred twenty trillion, five hundred eleven billion, five hundred twenty-three million, three hundred twenty-three thousand, four hundred one".