543642666123 has 4 divisors (see below), whose sum is σ = 724856888168. Its totient is φ = 362428444080.

The previous prime is 543642666113. The next prime is 543642666209. The reversal of 543642666123 is 321666246345.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 543642666123 - 2¹⁸ = 543642403979 is a prime.

It is a super-2 number, since 2×543642666123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543642666113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90607111018 + ... + 90607111023.

It is an arithmetic number, because the mean of its divisors is an integer number (181214222042).

Almost surely, 2^543642666123 is an apocalyptic number.

543642666123 is a deficient number, since it is larger than the sum of its proper divisors (181214222045).

543642666123 is a wasteful number, since it uses less digits than its factorization.

543642666123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181214222044.

The product of its digits is 3732480, while the sum is 48.

The spelling of 543642666123 in words is "five hundred forty-three billion, six hundred forty-two million, six hundred sixty-six thousand, one hundred twenty-three".