816418430442 has 20 divisors (see below), whose sum is σ = 1829382038946. Its totient is φ = 272139476760.

The previous prime is 816418430413. The next prime is 816418430447. The reversal of 816418430442 is 244034814618.

816418430442 is a `hidden beast` number, since 8 + 164 + 1 + 8 + 43 + 0 + 442 = 666.

It can be written as a sum of positive squares in only one way, i.e., 734245048161 + 82173382281 = 856881^2 + 286659^2 .

It is not an unprimeable number, because it can be changed into a prime (816418430447) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2519809809 + ... + 2519810132.

Almost surely, 2^816418430442 is an apocalyptic number.

816418430442 is an abundant number, since it is smaller than the sum of its proper divisors (1012963608504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816418430442 is a wasteful number, since it uses less digits than its factorization.

816418430442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039619955 (or 5039619946 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 816418430442 in words is "eight hundred sixteen billion, four hundred eighteen million, four hundred thirty thousand, four hundred forty-two".