442131256401161 has 4 divisors (see below), whose sum is σ = 443851611484692. Its totient is φ = 440410901317632.

The previous prime is 442131256401127. The next prime is 442131256401199. The reversal of 442131256401161 is 161104652131244.

It is a happy number.

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 421885027225600 + 20246229175561 = 20539840^2 + 4499581^2 .

It is a cyclic number.

It is not a de Polignac number, because 442131256401161 - 2¹⁸ = 442131256139017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442131256401101) 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, 860177541380 + ... + 860177541893.

It is an arithmetic number, because the mean of its divisors is an integer number (110962902871173).

Almost surely, 2^{442131256401161} is an apocalyptic number.

It is an amenable number.

442131256401161 is a deficient number, since it is larger than the sum of its proper divisors (1720355083531).

442131256401161 is a wasteful number, since it uses less digits than its factorization.

442131256401161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720355083530.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 442131256401161 in words is "four hundred forty-two trillion, one hundred thirty-one billion, two hundred fifty-six million, four hundred one thousand, one hundred sixty-one".