641450565 has 192 divisors, whose sum is σ = 1423319040. Its totient is φ = 260789760.

The previous prime is 641450521. The next prime is 641450569. The reversal of 641450565 is 565054146.

641450565 is a `hidden beast` number, since 6 + 41 + 4 + 50 + 565 = 666.

It is not a de Polignac number, because 641450565 - 2¹² = 641446469 is a prime.

It is a super-2 number, since 2×641450565² = 822917654677638450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641450569) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 9034480 + ... + 9034550.

It is an arithmetic number, because the mean of its divisors is an integer number (7413120).

Almost surely, 2^641450565 is an apocalyptic number.

It is an amenable number.

641450565 is an abundant number, since it is smaller than the sum of its proper divisors (781868475).

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

641450565 is a wasteful number, since it uses less digits than its factorization.

641450565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 641450565 is about 25326.8743630161. The cubic root of 641450565 is about 862.4244571518.

The spelling of 641450565 in words is "six hundred forty-one million, four hundred fifty thousand, five hundred sixty-five".