455319561821 has 2 divisors, whose sum is σ = 455319561822. Its totient is φ = 455319561820.

The previous prime is 455319561779. The next prime is 455319561833. The reversal of 455319561821 is 128165913554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439522591225 + 15796970596 = 662965^2 + 125686^2 .

It is a cyclic number.

It is not a de Polignac number, because 455319561821 - 2¹⁰ = 455319560797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 455319561821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (455319560821) 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, 227659780910 + 227659780911.

It is an arithmetic number, because the mean of its divisors is an integer number (227659780911).

Almost surely, 2^455319561821 is an apocalyptic number.

It is an amenable number.

455319561821 is a deficient number, since it is larger than the sum of its proper divisors (1).

455319561821 is an equidigital number, since it uses as much as digits as its factorization.

455319561821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 50.

The spelling of 455319561821 in words is "four hundred fifty-five billion, three hundred nineteen million, five hundred sixty-one thousand, eight hundred twenty-one".