320240081801 has 2 divisors, whose sum is σ = 320240081802. Its totient is φ = 320240081800.

The previous prime is 320240081797. The next prime is 320240081881. The reversal of 320240081801 is 108180042023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316873297225 + 3366784576 = 562915^2 + 58024^2 .

It is a cyclic number.

It is not a de Polignac number, because 320240081801 - 2² = 320240081797 is a prime.

It is a super-2 number, since 2×320240081801² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320240081881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160120040900 + 160120040901.

It is an arithmetic number, because the mean of its divisors is an integer number (160120040901).

Almost surely, 2^320240081801 is an apocalyptic number.

It is an amenable number.

320240081801 is a deficient number, since it is larger than the sum of its proper divisors (1).

320240081801 is an equidigital number, since it uses as much as digits as its factorization.

320240081801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 320240081801 in words is "three hundred twenty billion, two hundred forty million, eighty-one thousand, eight hundred one".