641342306533 has 2 divisors, whose sum is σ = 641342306534. Its totient is φ = 641342306532.

The previous prime is 641342306519. The next prime is 641342306551. The reversal of 641342306533 is 335603243146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359373872484 + 281968434049 = 599478^2 + 531007^2 .

It is a cyclic number.

It is not a de Polignac number, because 641342306533 - 2¹³ = 641342298341 is a prime.

It is a super-2 number, since 2×641342306533² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641342306513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320671153266 + 320671153267.

It is an arithmetic number, because the mean of its divisors is an integer number (320671153267).

Almost surely, 2^641342306533 is an apocalyptic number.

It is an amenable number.

641342306533 is a deficient number, since it is larger than the sum of its proper divisors (1).

641342306533 is an equidigital number, since it uses as much as digits as its factorization.

641342306533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 40.

Adding to 641342306533 its reverse (335603243146), we get a palindrome (976945549679).

The spelling of 641342306533 in words is "six hundred forty-one billion, three hundred forty-two million, three hundred six thousand, five hundred thirty-three".