442243060661 has 4 divisors (see below), whose sum is σ = 454195575852. Its totient is φ = 430290545472.

The previous prime is 442243060627. The next prime is 442243060691. The reversal of 442243060661 is 166060342244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394421680900 + 47821379761 = 628030^2 + 218681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442243060661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442243060691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5976257540 + ... + 5976257613.

It is an arithmetic number, because the mean of its divisors is an integer number (113548893963).

Almost surely, 2^442243060661 is an apocalyptic number.

It is an amenable number.

442243060661 is a deficient number, since it is larger than the sum of its proper divisors (11952515191).

442243060661 is a wasteful number, since it uses less digits than its factorization.

442243060661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11952515190.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 442243060661 in words is "four hundred forty-two billion, two hundred forty-three million, sixty thousand, six hundred sixty-one".