845821804133 has 2 divisors, whose sum is σ = 845821804134. Its totient is φ = 845821804132.

The previous prime is 845821804067. The next prime is 845821804151. The reversal of 845821804133 is 331408128548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 778661526724 + 67160277409 = 882418^2 + 259153^2 .

It is a cyclic number.

It is not a de Polignac number, because 845821804133 - 2¹² = 845821800037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845821800133) 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, 422910902066 + 422910902067.

It is an arithmetic number, because the mean of its divisors is an integer number (422910902067).

Almost surely, 2^845821804133 is an apocalyptic number.

It is an amenable number.

845821804133 is a deficient number, since it is larger than the sum of its proper divisors (1).

845821804133 is an equidigital number, since it uses as much as digits as its factorization.

845821804133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 845821804133 in words is "eight hundred forty-five billion, eight hundred twenty-one million, eight hundred four thousand, one hundred thirty-three".