42466644421 has 4 divisors (see below), whose sum is σ = 43931011500. Its totient is φ = 41002277344.

The previous prime is 42466644413. The next prime is 42466644449. The reversal of 42466644421 is 12444666424.

42466644421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15119407521 + 27347236900 = 122961^2 + 165370^2 .

It is a cyclic number.

It is not a de Polignac number, because 42466644421 - 2³ = 42466644413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42466644821) 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, 732183496 + ... + 732183553.

It is an arithmetic number, because the mean of its divisors is an integer number (10982752875).

Almost surely, 2^42466644421 is an apocalyptic number.

It is an amenable number.

42466644421 is a deficient number, since it is larger than the sum of its proper divisors (1464367079).

42466644421 is a wasteful number, since it uses less digits than its factorization.

42466644421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464367078.

The product of its digits is 884736, while the sum is 43.

The spelling of 42466644421 in words is "forty-two billion, four hundred sixty-six million, six hundred forty-four thousand, four hundred twenty-one".