845252218819 has 2 divisors, whose sum is σ = 845252218820. Its totient is φ = 845252218818.

The previous prime is 845252218799. The next prime is 845252218841. The reversal of 845252218819 is 918812252548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845252218819 - 2¹⁹ = 845251694531 is a prime.

It is a super-2 number, since 2×845252218819² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 845252218819.

It is not a weakly prime, because it can be changed into another prime (845252218849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422626109409 + 422626109410.

It is an arithmetic number, because the mean of its divisors is an integer number (422626109410).

Almost surely, 2^845252218819 is an apocalyptic number.

845252218819 is a deficient number, since it is larger than the sum of its proper divisors (1).

845252218819 is an equidigital number, since it uses as much as digits as its factorization.

845252218819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3686400, while the sum is 55.

The spelling of 845252218819 in words is "eight hundred forty-five billion, two hundred fifty-two million, two hundred eighteen thousand, eight hundred nineteen".