641441532 has 12 divisors (see below), whose sum is σ = 1496696936. Its totient is φ = 213813840.

The previous prime is 641441531. The next prime is 641441533. The reversal of 641441532 is 235144146.

It is an interprime number because it is at equal distance from previous prime (641441531) and next prime (641441533).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×641441532² = 822894477949014048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641441532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641441531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26726719 + ... + 26726742.

Almost surely, 2^641441532 is an apocalyptic number.

It is an amenable number.

641441532 is an abundant number, since it is smaller than the sum of its proper divisors (855255404).

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

641441532 is a wasteful number, since it uses less digits than its factorization.

641441532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53453468 (or 53453466 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 641441532 is about 25326.6960340270. The cubic root of 641441532 is about 862.4204088707.

Adding to 641441532 its reverse (235144146), we get a palindrome (876585678).

The spelling of 641441532 in words is "six hundred forty-one million, four hundred forty-one thousand, five hundred thirty-two".