243543018642 has 32 divisors (see below), whose sum is σ = 607276099584. Its totient is φ = 63257926800.

The previous prime is 243543018637. The next prime is 243543018701. The reversal of 243543018642 is 246810345342.

It is a super-3 number, since 3×243543018642³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 243543018594 and 243543018603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263574234 + ... + 263575157.

It is an arithmetic number, because the mean of its divisors is an integer number (18977378112).

Almost surely, 2^243543018642 is an apocalyptic number.

243543018642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243543018642 is an abundant number, since it is smaller than the sum of its proper divisors (363733080942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243543018642 is a wasteful number, since it uses less digits than its factorization.

243543018642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527149414.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 243543018642 in words is "two hundred forty-three billion, five hundred forty-three million, eighteen thousand, six hundred forty-two".