42444808621 has 8 divisors (see below), whose sum is σ = 42609300984. Its totient is φ = 42280412160.

The previous prime is 42444808613. The next prime is 42444808631. The reversal of 42444808621 is 12680844424.

42444808621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 31325106121 + 11119702500 = 176989^2 + 105450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42444808621 - 2³ = 42444808613 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 (42444808631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936925 + ... + 981181.

It is an arithmetic number, because the mean of its divisors is an integer number (5326162623).

Almost surely, 2^42444808621 is an apocalyptic number.

It is an amenable number.

42444808621 is a deficient number, since it is larger than the sum of its proper divisors (164492363).

42444808621 is a wasteful number, since it uses less digits than its factorization.

42444808621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47951.

The product of its (nonzero) digits is 393216, while the sum is 43.

The spelling of 42444808621 in words is "forty-two billion, four hundred forty-four million, eight hundred eight thousand, six hundred twenty-one".