442509866538 has 16 divisors (see below), whose sum is σ = 885044232480. Its totient is φ = 147499205616.

The previous prime is 442509866537. The next prime is 442509866569. The reversal of 442509866538 is 835668905244.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442509866537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781693 + ... + 1223136.

It is an arithmetic number, because the mean of its divisors is an integer number (55315264530).

Almost surely, 2^442509866538 is an apocalyptic number.

442509866538 is an abundant number, since it is smaller than the sum of its proper divisors (442534365942).

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

442509866538 is a wasteful number, since it uses less digits than its factorization.

442509866538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041621.

The product of its (nonzero) digits is 49766400, while the sum is 60.

The spelling of 442509866538 in words is "four hundred forty-two billion, five hundred nine million, eight hundred sixty-six thousand, five hundred thirty-eight".