2161642030543 has 16 divisors (see below), whose sum is σ = 2176574400000. Its totient is φ = 2146778152992.

The previous prime is 2161642030531. The next prime is 2161642030549. The reversal of 2161642030543 is 3450302461612.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161642030543 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 (2161642030549) 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, 85202046 + ... + 85227412.

It is an arithmetic number, because the mean of its divisors is an integer number (136035900000).

Almost surely, 2^{2161642030543} is an apocalyptic number.

2161642030543 is a deficient number, since it is larger than the sum of its proper divisors (14932369457).

2161642030543 is a wasteful number, since it uses less digits than its factorization.

2161642030543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26694.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 2161642030543 in words is "two trillion, one hundred sixty-one billion, six hundred forty-two million, thirty thousand, five hundred forty-three".