641523152 has 80 divisors (see below), whose sum is σ = 1372412160. Its totient is φ = 289142784.

The previous prime is 641523151. The next prime is 641523161. The reversal of 641523152 is 251325146.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641523151) 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, 1317053 + ... + 1317539.

It is an arithmetic number, because the mean of its divisors is an integer number (17155152).

Almost surely, 2^641523152 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 641523152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686206080).

641523152 is an abundant number, since it is smaller than the sum of its proper divisors (730889008).

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

641523152 is a wasteful number, since it uses less digits than its factorization.

641523152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 702 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 641523152 is about 25328.3073259940. The cubic root of 641523152 is about 862.4569867788.

Adding to 641523152 its reverse (251325146), we get a palindrome (892848298).

The spelling of 641523152 in words is "six hundred forty-one million, five hundred twenty-three thousand, one hundred fifty-two".