643882711122 has 96 divisors (see below), whose sum is σ = 1604030014080. Its totient is φ = 182853561600.

The previous prime is 643882711111. The next prime is 643882711123. The reversal of 643882711122 is 221117288346.

643882711122 is a `hidden beast` number, since 6 + 438 + 82 + 7 + 11 + 122 = 666.

643882711122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (643882711123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60732622 + ... + 60743222.

It is an arithmetic number, because the mean of its divisors is an integer number (16708645980).

Almost surely, 2^643882711122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643882711122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802015007040).

643882711122 is an abundant number, since it is smaller than the sum of its proper divisors (960147302958).

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

643882711122 is a wasteful number, since it uses less digits than its factorization.

643882711122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13488 (or 13485 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

Adding to 643882711122 its reverse (221117288346), we get a palindrome (864999999468).

The spelling of 643882711122 in words is "six hundred forty-three billion, eight hundred eighty-two million, seven hundred eleven thousand, one hundred twenty-two".