2161643511341 has 16 divisors (see below), whose sum is σ = 2210996922624. Its totient is φ = 2112860166144.

The previous prime is 2161643511317. The next prime is 2161643511343. The reversal of 2161643511341 is 1431153461612.

It is a cyclic number.

It is not a de Polignac number, because 2161643511341 - 2¹⁰ = 2161643510317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2161643511295 and 2161643511304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161643511343) 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, 24293765 + ... + 24382581.

It is an arithmetic number, because the mean of its divisors is an integer number (138187307664).

Almost surely, 2^{2161643511341} is an apocalyptic number.

It is an amenable number.

2161643511341 is a deficient number, since it is larger than the sum of its proper divisors (49353411283).

2161643511341 is an equidigital number, since it uses as much as digits as its factorization.

2161643511341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92020.

The product of its digits is 51840, while the sum is 38.

Adding to 2161643511341 its reverse (1431153461612), we get a palindrome (3592796972953).

The spelling of 2161643511341 in words is "two trillion, one hundred sixty-one billion, six hundred forty-three million, five hundred eleven thousand, three hundred forty-one".