442312013646 has 12 divisors (see below), whose sum is σ = 958342696272. Its totient is φ = 147437337876.

The previous prime is 442312013573. The next prime is 442312013707. The reversal of 442312013646 is 646310213244.

442312013646 is a `hidden beast` number, since 4 + 4 + 2 + 3 + 1 + 2 + 0 + 1 + 3 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 442312013646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12286444806 + ... + 12286444841.

It is an arithmetic number, because the mean of its divisors is an integer number (79861891356).

Almost surely, 2^442312013646 is an apocalyptic number.

442312013646 is an abundant number, since it is smaller than the sum of its proper divisors (516030682626).

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

442312013646 is a wasteful number, since it uses less digits than its factorization.

442312013646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24572889655 (or 24572889652 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 442312013646 in words is "four hundred forty-two billion, three hundred twelve million, thirteen thousand, six hundred forty-six".