22165643543 has 2 divisors, whose sum is σ = 22165643544. Its totient is φ = 22165643542.

The previous prime is 22165643531. The next prime is 22165643597. The reversal of 22165643543 is 34534656122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22165643543 - 2⁴ = 22165643527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22165643543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22165643503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11082821771 + 11082821772.

It is an arithmetic number, because the mean of its divisors is an integer number (11082821772).

Almost surely, 2^22165643543 is an apocalyptic number.

22165643543 is a deficient number, since it is larger than the sum of its proper divisors (1).

22165643543 is an equidigital number, since it uses as much as digits as its factorization.

22165643543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 41.

The spelling of 22165643543 in words is "twenty-two billion, one hundred sixty-five million, six hundred forty-three thousand, five hundred forty-three".