6454985322221 has 2 divisors, whose sum is σ = 6454985322222. Its totient is φ = 6454985322220.

The previous prime is 6454985322187. The next prime is 6454985322263. The reversal of 6454985322221 is 1222235894546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5427571981225 + 1027413340996 = 2329715^2 + 1013614^2 .

It is a cyclic number.

It is not a de Polignac number, because 6454985322221 - 2²⁶ = 6454918213357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6454985322271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227492661110 + 3227492661111.

It is an arithmetic number, because the mean of its divisors is an integer number (3227492661111).

Almost surely, 2^{6454985322221} is an apocalyptic number.

It is an amenable number.

6454985322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6454985322221 is an equidigital number, since it uses as much as digits as its factorization.

6454985322221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8294400, while the sum is 53.

The spelling of 6454985322221 in words is "six trillion, four hundred fifty-four billion, nine hundred eighty-five million, three hundred twenty-two thousand, two hundred twenty-one".