442173581673 has 4 divisors (see below), whose sum is σ = 589564775568. Its totient is φ = 294782387780.

The previous prime is 442173581639. The next prime is 442173581741. The reversal of 442173581673 is 376185371244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442173581673 - 2⁸ = 442173581417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442173531673) 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, 73695596943 + ... + 73695596948.

It is an arithmetic number, because the mean of its divisors is an integer number (147391193892).

Almost surely, 2^442173581673 is an apocalyptic number.

It is an amenable number.

442173581673 is a deficient number, since it is larger than the sum of its proper divisors (147391193895).

442173581673 is a wasteful number, since it uses less digits than its factorization.

442173581673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147391193894.

The product of its digits is 3386880, while the sum is 51.

The spelling of 442173581673 in words is "four hundred forty-two billion, one hundred seventy-three million, five hundred eighty-one thousand, six hundred seventy-three".