641418559 has 4 divisors (see below), whose sum is σ = 652290120. Its totient is φ = 630547000.

The previous prime is 641418527. The next prime is 641418563. The reversal of 641418559 is 955814146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641418559 - 2⁵ = 641418527 is a prime.

It is a super-2 number, since 2×641418559² = 822835535659272962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641418059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5435692 + ... + 5435809.

It is an arithmetic number, because the mean of its divisors is an integer number (163072530).

Almost surely, 2^641418559 is an apocalyptic number.

641418559 is a deficient number, since it is larger than the sum of its proper divisors (10871561).

641418559 is a wasteful number, since it uses less digits than its factorization.

641418559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871560.

The product of its digits is 172800, while the sum is 43.

The square root of 641418559 is about 25326.2424966674. The cubic root of 641418559 is about 862.4101129878.

The spelling of 641418559 in words is "six hundred forty-one million, four hundred eighteen thousand, five hundred fifty-nine".