644211060032 has 14 divisors (see below), whose sum is σ = 1278356322378. Its totient is φ = 322105529984.

The previous prime is 644211060023. The next prime is 644211060043. The reversal of 644211060032 is 230060112446.

It can be written as a sum of positive squares in only one way, i.e., 541436958976 + 102774101056 = 735824^2 + 320584^2 .

It is a junction number, because it is equal to n+sod(n) for n = 644211059977 and 644211060004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032898843 + ... + 5032898970.

Almost surely, 2^644211060032 is an apocalyptic number.

It is an amenable number.

644211060032 is a deficient number, since it is larger than the sum of its proper divisors (634145262346).

644211060032 is a wasteful number, since it uses less digits than its factorization.

644211060032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10065797825 (or 10065797815 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 644211060032 its reverse (230060112446), we get a palindrome (874271172478).

The spelling of 644211060032 in words is "six hundred forty-four billion, two hundred eleven million, sixty thousand, thirty-two".