455521643 has 2 divisors, whose sum is σ = 455521644. Its totient is φ = 455521642.

The previous prime is 455521621. The next prime is 455521753. The reversal of 455521643 is 346125554.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455521643 is a prime.

It is not a weakly prime, because it can be changed into another prime (455521043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227760821 + 227760822.

It is an arithmetic number, because the mean of its divisors is an integer number (227760822).

Almost surely, 2^455521643 is an apocalyptic number.

455521643 is a deficient number, since it is larger than the sum of its proper divisors (1).

455521643 is an equidigital number, since it uses as much as digits as its factorization.

455521643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 35.

The square root of 455521643 is about 21342.9530056176. The cubic root of 455521643 is about 769.4309862597.

The spelling of 455521643 in words is "four hundred fifty-five million, five hundred twenty-one thousand, six hundred forty-three".