6643532353459 has 2 divisors, whose sum is σ = 6643532353460. Its totient is φ = 6643532353458.

The previous prime is 6643532353439. The next prime is 6643532353477. The reversal of 6643532353459 is 9543532353466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6643532353459 - 2¹³ = 6643532345267 is a prime.

It is not a weakly prime, because it can be changed into another prime (6643532353439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321766176729 + 3321766176730.

It is an arithmetic number, because the mean of its divisors is an integer number (3321766176730).

Almost surely, 2^{6643532353459} is an apocalyptic number.

6643532353459 is a deficient number, since it is larger than the sum of its proper divisors (1).

6643532353459 is an equidigital number, since it uses as much as digits as its factorization.

6643532353459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976000, while the sum is 58.

The spelling of 6643532353459 in words is "six trillion, six hundred forty-three billion, five hundred thirty-two million, three hundred fifty-three thousand, four hundred fifty-nine".