442621686126243 has 16 divisors (see below), whose sum is σ = 641852010961056. Its totient is φ = 269685718886400.

The previous prime is 442621686126223. The next prime is 442621686126253. The reversal of 442621686126243 is 342621686126244.

It is a de Polignac number, because none of the positive numbers 2^k-442621686126243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442621686126223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56184520830 + ... + 56184528707.

It is an arithmetic number, because the mean of its divisors is an integer number (40115750685066).

Almost surely, 2^{442621686126243} is an apocalyptic number.

442621686126243 is a deficient number, since it is larger than the sum of its proper divisors (199230324834813).

442621686126243 is a wasteful number, since it uses less digits than its factorization.

442621686126243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112369049654.

The product of its digits is 31850496, while the sum is 57.

Subtracting from 442621686126243 its reverse (342621686126244), we obtain a palindrome (99999999999999).

The spelling of 442621686126243 in words is "four hundred forty-two trillion, six hundred twenty-one billion, six hundred eighty-six million, one hundred twenty-six thousand, two hundred forty-three".