845550110609 has 2 divisors, whose sum is σ = 845550110610. Its totient is φ = 845550110608.

The previous prime is 845550110591. The next prime is 845550110659. The reversal of 845550110609 is 906011055548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779653680400 + 65896430209 = 882980^2 + 256703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845550110609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 845550110609.

It is not a weakly prime, because it can be changed into another prime (845550110659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422775055304 + 422775055305.

It is an arithmetic number, because the mean of its divisors is an integer number (422775055305).

Almost surely, 2^845550110609 is an apocalyptic number.

It is an amenable number.

845550110609 is a deficient number, since it is larger than the sum of its proper divisors (1).

845550110609 is an equidigital number, since it uses as much as digits as its factorization.

845550110609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 845550110609 in words is "eight hundred forty-five billion, five hundred fifty million, one hundred ten thousand, six hundred nine".