1641843778683 has 16 divisors (see below), whose sum is σ = 2326714407680. Its totient is φ = 1026886447584.

The previous prime is 1641843778669. The next prime is 1641843778693. The reversal of 1641843778683 is 3868773481461.

It is not a de Polignac number, because 1641843778683 - 2⁸ = 1641843778427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641843778633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139820716 + ... + 139832457.

It is an arithmetic number, because the mean of its divisors is an integer number (145419650480).

Almost surely, 2^{1641843778683} is an apocalyptic number.

1641843778683 is a deficient number, since it is larger than the sum of its proper divisors (684870628997).

1641843778683 is a wasteful number, since it uses less digits than its factorization.

1641843778683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279653298.

The product of its digits is 130056192, while the sum is 66.

The spelling of 1641843778683 in words is "one trillion, six hundred forty-one billion, eight hundred forty-three million, seven hundred seventy-eight thousand, six hundred eighty-three".