422561760818 has 18 divisors (see below), whose sum is σ = 639862794711. Its totient is φ = 209292881184.

The previous prime is 422561760757. The next prime is 422561760821. The reversal of 422561760818 is 818067165224.

It can be written as a sum of positive squares in 5 ways, for example, as 414572440129 + 7989320689 = 643873^2 + 89383^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=459653.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 100202246 + ... + 100206462.

Almost surely, 2^422561760818 is an apocalyptic number.

422561760818 is a deficient number, since it is larger than the sum of its proper divisors (217301033893).

422561760818 is an frugal number, since it uses more digits than its factorization.

422561760818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8654 (or 4328 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

Multiplying 422561760818 by its sum of digits (50), we get a square (21128088040900 = 4596530²).

The spelling of 422561760818 in words is "four hundred twenty-two billion, five hundred sixty-one million, seven hundred sixty thousand, eight hundred eighteen".