320705500001 has 2 divisors, whose sum is σ = 320705500002. Its totient is φ = 320705500000.

The previous prime is 320705499943. The next prime is 320705500013. The reversal of 320705500001 is 100005507023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320016490000 + 689010001 = 565700^2 + 26249^2 .

It is a cyclic number.

It is not a de Polignac number, because 320705500001 - 2¹⁰ = 320705498977 is a prime.

It is a super-2 number, since 2×320705500001² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320705500001.

It is not a weakly prime, because it can be changed into another prime (320705500051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160352750000 + 160352750001.

It is an arithmetic number, because the mean of its divisors is an integer number (160352750001).

Almost surely, 2^320705500001 is an apocalyptic number.

It is an amenable number.

320705500001 is a deficient number, since it is larger than the sum of its proper divisors (1).

320705500001 is an equidigital number, since it uses as much as digits as its factorization.

320705500001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 23.

The spelling of 320705500001 in words is "three hundred twenty billion, seven hundred five million, five hundred thousand, one".