338890322581 has 2 divisors, whose sum is σ = 338890322582. Its totient is φ = 338890322580.

The previous prime is 338890322579. The next prime is 338890322609. The reversal of 338890322581 is 185223098833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187134108100 + 151756214481 = 432590^2 + 389559^2 .

It is an emirp because it is prime and its reverse (185223098833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 338890322581 - 2¹ = 338890322579 is a prime.

It is a super-2 number, since 2×338890322581² (a number of 24 digits) contains 22 as substring.

Together with 338890322579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338890322531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169445161290 + 169445161291.

It is an arithmetic number, because the mean of its divisors is an integer number (169445161291).

Almost surely, 2^338890322581 is an apocalyptic number.

It is an amenable number.

338890322581 is a deficient number, since it is larger than the sum of its proper divisors (1).

338890322581 is an equidigital number, since it uses as much as digits as its factorization.

338890322581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 338890322581 in words is "three hundred thirty-eight billion, eight hundred ninety million, three hundred twenty-two thousand, five hundred eighty-one".