641320305213503 has 2 divisors, whose sum is σ = 641320305213504. Its totient is φ = 641320305213502.

The previous prime is 641320305213493. The next prime is 641320305213517. The reversal of 641320305213503 is 305312503023146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641320305213503 is a prime.

It is a super-2 number, since 2×641320305213503² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641320305213803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320660152606751 + 320660152606752.

It is an arithmetic number, because the mean of its divisors is an integer number (320660152606752).

Almost surely, 2^{641320305213503} is an apocalyptic number.

641320305213503 is a deficient number, since it is larger than the sum of its proper divisors (1).

641320305213503 is an equidigital number, since it uses as much as digits as its factorization.

641320305213503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 641320305213503 its reverse (305312503023146), we get a palindrome (946632808236649).

The spelling of 641320305213503 in words is "six hundred forty-one trillion, three hundred twenty billion, three hundred five million, two hundred thirteen thousand, five hundred three".