2163379219805 has 18 divisors (see below), whose sum is σ = 2757818349006. Its totient is φ = 1628855196928.

The previous prime is 2163379219801. The next prime is 2163379219823. The reversal of 2163379219805 is 5089129733612.

It can be written as a sum of positive squares in 9 ways, for example, as 110890332004 + 2052488887801 = 333002^2 + 1432651^2 .

It is not a de Polignac number, because 2163379219805 - 2² = 2163379219801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163379219801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55892039 + ... + 55930731.

Almost surely, 2^{2163379219805} is an apocalyptic number.

It is an amenable number.

2163379219805 is a deficient number, since it is larger than the sum of its proper divisors (594439129201).

2163379219805 is an frugal number, since it uses more digits than its factorization.

2163379219805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77425 (or 38715 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 2163379219805 in words is "two trillion, one hundred sixty-three billion, three hundred seventy-nine million, two hundred nineteen thousand, eight hundred five".