845208551219 has 2 divisors, whose sum is σ = 845208551220. Its totient is φ = 845208551218.

The previous prime is 845208551141. The next prime is 845208551221. The reversal of 845208551219 is 912155802548.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845208551219 - 2¹⁶ = 845208485683 is a prime.

It is a super-2 number, since 2×845208551219² (a number of 25 digits) contains 22 as substring.

Together with 845208551221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (845208551279) 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, 422604275609 + 422604275610.

It is an arithmetic number, because the mean of its divisors is an integer number (422604275610).

Almost surely, 2^845208551219 is an apocalyptic number.

845208551219 is a deficient number, since it is larger than the sum of its proper divisors (1).

845208551219 is an equidigital number, since it uses as much as digits as its factorization.

845208551219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152000, while the sum is 50.

The spelling of 845208551219 in words is "eight hundred forty-five billion, two hundred eight million, five hundred fifty-one thousand, two hundred nineteen".