641241552 has 80 divisors (see below), whose sum is σ = 1910056320. Its totient is φ = 181579776.

The previous prime is 641241527. The next prime is 641241553. The reversal of 641241552 is 255142146.

It is a super-2 number, since 2×641241552² = 822381456022737408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641241553) 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, 29524 + ... + 46412.

It is an arithmetic number, because the mean of its divisors is an integer number (23875704).

Almost surely, 2^641241552 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 641241552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955028160).

641241552 is an abundant number, since it is smaller than the sum of its proper divisors (1268814768).

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

641241552 is a wasteful number, since it uses less digits than its factorization.

641241552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17020 (or 17014 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 641241552 is about 25322.7477182078. The cubic root of 641241552 is about 862.3307749493.

Adding to 641241552 its reverse (255142146), we get a palindrome (896383698).

The spelling of 641241552 in words is "six hundred forty-one million, two hundred forty-one thousand, five hundred fifty-two".