16663211543 has 32 divisors (see below), whose sum is σ = 19024201728. Its totient is φ = 14458060800.

The previous prime is 16663211519. The next prime is 16663211563. The reversal of 16663211543 is 34511236661.

It is a cyclic number.

It is not a de Polignac number, because 16663211543 - 2⁸ = 16663211287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16663211497 and 16663211506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663211563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9376271 + ... + 9378047.

It is an arithmetic number, because the mean of its divisors is an integer number (594506304).

Almost surely, 2^16663211543 is an apocalyptic number.

16663211543 is a deficient number, since it is larger than the sum of its proper divisors (2360990185).

16663211543 is a wasteful number, since it uses less digits than its factorization.

16663211543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its digits is 77760, while the sum is 38.

The spelling of 16663211543 in words is "sixteen billion, six hundred sixty-three million, two hundred eleven thousand, five hundred forty-three".