563350404321821 has 2 divisors, whose sum is σ = 563350404321822. Its totient is φ = 563350404321820.

The previous prime is 563350404321791. The next prime is 563350404321853. The reversal of 563350404321821 is 128123404053365.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407905115548921 + 155445288772900 = 20196661^2 + 12467770^2 .

It is a cyclic number.

It is not a de Polignac number, because 563350404321821 - 2³⁴ = 563333224452637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563350404351821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281675202160910 + 281675202160911.

It is an arithmetic number, because the mean of its divisors is an integer number (281675202160911).

Almost surely, 2^{563350404321821} is an apocalyptic number.

It is an amenable number.

563350404321821 is a deficient number, since it is larger than the sum of its proper divisors (1).

563350404321821 is an equidigital number, since it uses as much as digits as its factorization.

563350404321821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 563350404321821 in words is "five hundred sixty-three trillion, three hundred fifty billion, four hundred four million, three hundred twenty-one thousand, eight hundred twenty-one".