42320424340081 has 2 divisors, whose sum is σ = 42320424340082. Its totient is φ = 42320424340080.

The previous prime is 42320424340067. The next prime is 42320424340111. The reversal of 42320424340081 is 18004342402324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31306263040000 + 11014161300081 = 5595200^2 + 3318759^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320424340081 - 2²⁷ = 42320290122353 is a prime.

It is a super-3 number, since 3×42320424340081³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 42320424340081.

It is not a weakly prime, because it can be changed into another prime (42320424140081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160212170040 + 21160212170041.

It is an arithmetic number, because the mean of its divisors is an integer number (21160212170041).

Almost surely, 2^{42320424340081} is an apocalyptic number.

It is an amenable number.

42320424340081 is a deficient number, since it is larger than the sum of its proper divisors (1).

42320424340081 is an equidigital number, since it uses as much as digits as its factorization.

42320424340081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 42320424340081 in words is "forty-two trillion, three hundred twenty billion, four hundred twenty-four million, three hundred forty thousand, eighty-one".