644063210041 has 16 divisors (see below), whose sum is σ = 659876152320. Its totient is φ = 628288859520.

The previous prime is 644063210033. The next prime is 644063210047. The reversal of 644063210041 is 140012360446.

644063210041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 644063210041 - 2³ = 644063210033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 644063209985 and 644063210012.

It is not an unprimeable number, because it can be changed into a prime (644063210047) 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, 173646895 + ... + 173650603.

It is an arithmetic number, because the mean of its divisors is an integer number (41242259520).

Almost surely, 2^644063210041 is an apocalyptic number.

It is an amenable number.

644063210041 is a deficient number, since it is larger than the sum of its proper divisors (15812942279).

644063210041 is a wasteful number, since it uses less digits than its factorization.

644063210041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 644063210041 its reverse (140012360446), we get a palindrome (784075570487).

The spelling of 644063210041 in words is "six hundred forty-four billion, sixty-three million, two hundred ten thousand, forty-one".