641785619841 has 16 divisors (see below), whose sum is σ = 900276736128. Its totient is φ = 406139875200.

The previous prime is 641785619837. The next prime is 641785619857. The reversal of 641785619841 is 148916587146.

641785619841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641785619841 - 2² = 641785619837 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641785619801) 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, 70505845 + ... + 70514946.

It is an arithmetic number, because the mean of its divisors is an integer number (56267296008).

Almost surely, 2^641785619841 is an apocalyptic number.

It is an amenable number.

641785619841 is a deficient number, since it is larger than the sum of its proper divisors (258491116287).

641785619841 is a wasteful number, since it uses less digits than its factorization.

641785619841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141020872.

The product of its digits is 11612160, while the sum is 60.

The spelling of 641785619841 in words is "six hundred forty-one billion, seven hundred eighty-five million, six hundred nineteen thousand, eight hundred forty-one".