6454985922221 has 2 divisors, whose sum is σ = 6454985922222. Its totient is φ = 6454985922220.

The previous prime is 6454985922157. The next prime is 6454985922337. The reversal of 6454985922221 is 1222295894546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5754534097321 + 700451824900 = 2398861^2 + 836930^2 .

It is a cyclic number.

It is not a de Polignac number, because 6454985922221 - 2⁶ = 6454985922157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6454985322221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227492961110 + 3227492961111.

It is an arithmetic number, because the mean of its divisors is an integer number (3227492961111).

Almost surely, 2^{6454985922221} is an apocalyptic number.

It is an amenable number.

6454985922221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6454985922221 is an equidigital number, since it uses as much as digits as its factorization.

6454985922221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24883200, while the sum is 59.

The spelling of 6454985922221 in words is "six trillion, four hundred fifty-four billion, nine hundred eighty-five million, nine hundred twenty-two thousand, two hundred twenty-one".