641485443 has 4 divisors (see below), whose sum is σ = 855313928. Its totient is φ = 427656960.

The previous prime is 641485409. The next prime is 641485483. The reversal of 641485443 is 344584146.

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

It is not a de Polignac number, because 641485443 - 2⁹ = 641484931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641485483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106914238 + ... + 106914243.

It is an arithmetic number, because the mean of its divisors is an integer number (213828482).

Almost surely, 2^641485443 is an apocalyptic number.

641485443 is a deficient number, since it is larger than the sum of its proper divisors (213828485).

641485443 is a wasteful number, since it uses less digits than its factorization.

641485443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213828484.

The product of its digits is 184320, while the sum is 39.

The square root of 641485443 is about 25327.5629107895. The cubic root of 641485443 is about 862.4400879199.

The spelling of 641485443 in words is "six hundred forty-one million, four hundred eighty-five thousand, four hundred forty-three".