642424341144441 has 4 divisors (see below), whose sum is σ = 856565788192592. Its totient is φ = 428282894096292.

The previous prime is 642424341144437. The next prime is 642424341144463. The reversal of 642424341144441 is 144441143424246.

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 not a de Polignac number, because 642424341144441 - 2² = 642424341144437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642424341144241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107070723524071 + ... + 107070723524076.

It is an arithmetic number, because the mean of its divisors is an integer number (214141447048148).

Almost surely, 2^{642424341144441} is an apocalyptic number.

It is an amenable number.

642424341144441 is a deficient number, since it is larger than the sum of its proper divisors (214141447048151).

642424341144441 is a wasteful number, since it uses less digits than its factorization.

642424341144441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214141447048150.

The product of its digits is 4718592, while the sum is 48.

Adding to 642424341144441 its reverse (144441143424246), we get a palindrome (786865484568687).

The spelling of 642424341144441 in words is "six hundred forty-two trillion, four hundred twenty-four billion, three hundred forty-one million, one hundred forty-four thousand, four hundred forty-one".