451643499184949 has 2 divisors, whose sum is σ = 451643499184950. Its totient is φ = 451643499184948.

The previous prime is 451643499184883. The next prime is 451643499184981. The reversal of 451643499184949 is 949481994346154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381826528705924 + 69816970479025 = 19540382^2 + 8355655^2 .

It is a cyclic number.

It is not a de Polignac number, because 451643499184949 - 2²⁸ = 451643230749493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451643499124949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225821749592474 + 225821749592475.

It is an arithmetic number, because the mean of its divisors is an integer number (225821749592475).

Almost surely, 2^{451643499184949} is an apocalyptic number.

It is an amenable number.

451643499184949 is a deficient number, since it is larger than the sum of its proper divisors (1).

451643499184949 is an equidigital number, since it uses as much as digits as its factorization.

451643499184949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4837294080, while the sum is 80.

The spelling of 451643499184949 in words is "four hundred fifty-one trillion, six hundred forty-three billion, four hundred ninety-nine million, one hundred eighty-four thousand, nine hundred forty-nine".