4321644134442 has 32 divisors (see below), whose sum is σ = 8663463536640. Its totient is φ = 1437185870640.

The previous prime is 4321644134389. The next prime is 4321644134443. The reversal of 4321644134442 is 2444314461234.

It is a junction number, because it is equal to n+sod(n) for n = 4321644134394 and 4321644134403.

It is not an unprimeable number, because it can be changed into a prime (4321644134443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63453267 + ... + 63521337.

It is an arithmetic number, because the mean of its divisors is an integer number (270733235520).

Almost surely, 2^{4321644134442} is an apocalyptic number.

4321644134442 is an abundant number, since it is smaller than the sum of its proper divisors (4341819402198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4321644134442 is a wasteful number, since it uses less digits than its factorization.

4321644134442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92618.

The product of its digits is 884736, while the sum is 42.

Adding to 4321644134442 its reverse (2444314461234), we get a palindrome (6765958595676).

The spelling of 4321644134442 in words is "four trillion, three hundred twenty-one billion, six hundred forty-four million, one hundred thirty-four thousand, four hundred forty-two".