641994327794 has 16 divisors (see below), whose sum is σ = 964469721600. Its totient is φ = 320504550624.

The previous prime is 641994327749. The next prime is 641994327809. The reversal of 641994327794 is 497723499146.

641994327794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 641994327794.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11359334 + ... + 11415710.

It is an arithmetic number, because the mean of its divisors is an integer number (60279357600).

Almost surely, 2^641994327794 is an apocalyptic number.

641994327794 is a deficient number, since it is larger than the sum of its proper divisors (322475393806).

641994327794 is a wasteful number, since it uses less digits than its factorization.

641994327794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65017.

The product of its digits is 82301184, while the sum is 65.

The spelling of 641994327794 in words is "six hundred forty-one billion, nine hundred ninety-four million, three hundred twenty-seven thousand, seven hundred ninety-four".