641305152 has 84 divisors (see below), whose sum is σ = 1842575436. Its totient is φ = 213258240.

The previous prime is 641305151. The next prime is 641305163. The reversal of 641305152 is 251503146.

641305152 is a `hidden beast` number, since 641 + 3 + 0 + 5 + 15 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92621376 + 548683776 = 9624^2 + 23424^2 .

It is a super-2 number, since 2×641305152² = 822544595963486208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641305151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299028 + ... + 301164.

Almost surely, 2^641305152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641305152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921287718).

641305152 is an abundant number, since it is smaller than the sum of its proper divisors (1201270284).

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

641305152 is a wasteful number, since it uses less digits than its factorization.

641305152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676 (or 2663 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 641305152 is about 25324.0034749642. The cubic root of 641305152 is about 862.3592834076.

Adding to 641305152 its reverse (251503146), we get a palindrome (892808298).

The spelling of 641305152 in words is "six hundred forty-one million, three hundred five thousand, one hundred fifty-two".