451206846521 has 2 divisors, whose sum is σ = 451206846522. Its totient is φ = 451206846520.

The previous prime is 451206846509. The next prime is 451206846523. The reversal of 451206846521 is 125648602154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406101582121 + 45105264400 = 637261^2 + 212380^2 .

It is a cyclic number.

It is not a de Polignac number, because 451206846521 - 2¹⁰ = 451206845497 is a prime.

It is a Sophie Germain prime.

Together with 451206846523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (451206846523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225603423260 + 225603423261.

It is an arithmetic number, because the mean of its divisors is an integer number (225603423261).

Almost surely, 2^451206846521 is an apocalyptic number.

It is an amenable number.

451206846521 is a deficient number, since it is larger than the sum of its proper divisors (1).

451206846521 is an equidigital number, since it uses as much as digits as its factorization.

451206846521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 451206846521 in words is "four hundred fifty-one billion, two hundred six million, eight hundred forty-six thousand, five hundred twenty-one".