442544610661 has 8 divisors (see below), whose sum is σ = 457515250304. Its totient is φ = 427732390800.

The previous prime is 442544610649. The next prime is 442544610727. The reversal of 442544610661 is 166016445244.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442544610661 - 2⁹ = 442544610149 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 (442544710661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39599265 + ... + 39610438.

It is an arithmetic number, because the mean of its divisors is an integer number (57189406288).

Almost surely, 2^442544610661 is an apocalyptic number.

It is an amenable number.

442544610661 is a deficient number, since it is larger than the sum of its proper divisors (14970639643).

442544610661 is a wasteful number, since it uses less digits than its factorization.

442544610661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79209891.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 442544610661 in words is "four hundred forty-two billion, five hundred forty-four million, six hundred ten thousand, six hundred sixty-one".