845828561 has 2 divisors, whose sum is σ = 845828562. Its totient is φ = 845828560.

The previous prime is 845828527. The next prime is 845828597. The reversal of 845828561 is 165828548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685654225 + 160174336 = 26185^2 + 12656^2 .

It is a cyclic number.

It is not a de Polignac number, because 845828561 - 2²² = 841634257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (845824561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422914280 + 422914281.

It is an arithmetic number, because the mean of its divisors is an integer number (422914281).

Almost surely, 2^845828561 is an apocalyptic number.

It is an amenable number.

845828561 is a deficient number, since it is larger than the sum of its proper divisors (1).

845828561 is an equidigital number, since it uses as much as digits as its factorization.

845828561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 614400, while the sum is 47.

The square root of 845828561 is about 29083.1318980608. The cubic root of 845828561 is about 945.7160985985.

The spelling of 845828561 in words is "eight hundred forty-five million, eight hundred twenty-eight thousand, five hundred sixty-one".