845278222898 has 6 divisors (see below), whose sum is σ = 1267919284671. Its totient is φ = 422638461342.

The previous prime is 845278222897. The next prime is 845278222961. The reversal of 845278222898 is 898222872548.

It can be written as a sum of positive squares in only one way, i.e., 422639111449 + 422639111449 = 650107^2 + 650107^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=650107.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845278222897) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 975161 + ... + 1625267.

Almost surely, 2^845278222898 is an apocalyptic number.

845278222898 is a deficient number, since it is larger than the sum of its proper divisors (422641061773).

845278222898 is an frugal number, since it uses more digits than its factorization.

845278222898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300216 (or 650109 counting only the distinct ones).

The product of its digits is 82575360, while the sum is 65.

The spelling of 845278222898 in words is "eight hundred forty-five billion, two hundred seventy-eight million, two hundred twenty-two thousand, eight hundred ninety-eight".