410444410021981 has 2 divisors, whose sum is σ = 410444410021982. Its totient is φ = 410444410021980.

The previous prime is 410444410021979. The next prime is 410444410022113. The reversal of 410444410021981 is 189120014444014.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295023014422756 + 115421395599225 = 17176234^2 + 10743435^2 .

It is a cyclic number.

It is not a de Polignac number, because 410444410021981 - 2¹ = 410444410021979 is a prime.

It is a super-2 number, since 2×410444410021981² (a number of 30 digits) contains 22 as substring.

Together with 410444410021979, 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 (410444410061981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205222205010990 + 205222205010991.

It is an arithmetic number, because the mean of its divisors is an integer number (205222205010991).

Almost surely, 2^{410444410021981} is an apocalyptic number.

It is an amenable number.

410444410021981 is a deficient number, since it is larger than the sum of its proper divisors (1).

410444410021981 is an equidigital number, since it uses as much as digits as its factorization.

410444410021981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 43.

Adding to 410444410021981 its reverse (189120014444014), we get a palindrome (599564424465995).

The spelling of 410444410021981 in words is "four hundred ten trillion, four hundred forty-four billion, four hundred ten million, twenty-one thousand, nine hundred eighty-one".