641984941379 has 2 divisors, whose sum is σ = 641984941380. Its totient is φ = 641984941378.

The previous prime is 641984941331. The next prime is 641984941391. The reversal of 641984941379 is 973149489146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641984941379 is a prime.

It is not a weakly prime, because it can be changed into another prime (641984949379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320992470689 + 320992470690.

It is an arithmetic number, because the mean of its divisors is an integer number (320992470690).

Almost surely, 2^641984941379 is an apocalyptic number.

641984941379 is a deficient number, since it is larger than the sum of its proper divisors (1).

641984941379 is an equidigital number, since it uses as much as digits as its factorization.

641984941379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 65.

The spelling of 641984941379 in words is "six hundred forty-one billion, nine hundred eighty-four million, nine hundred forty-one thousand, three hundred seventy-nine".