442642236222161 has 4 divisors (see below), whose sum is σ = 442653471691572. Its totient is φ = 442631000752752.

The previous prime is 442642236222103. The next prime is 442642236222181. The reversal of 442642236222161 is 161222632246244.

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 364531002363025 + 78111233859136 = 19092695^2 + 8838056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442642236222161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442642236222181) 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, 5617675610 + ... + 5617754403.

It is an arithmetic number, because the mean of its divisors is an integer number (110663367922893).

Almost surely, 2^{442642236222161} is an apocalyptic number.

It is an amenable number.

442642236222161 is a deficient number, since it is larger than the sum of its proper divisors (11235469411).

442642236222161 is a wasteful number, since it uses less digits than its factorization.

442642236222161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235469410.

The product of its digits is 2654208, while the sum is 47.

The spelling of 442642236222161 in words is "four hundred forty-two trillion, six hundred forty-two billion, two hundred thirty-six million, two hundred twenty-two thousand, one hundred sixty-one".