243535668738 has 16 divisors (see below), whose sum is σ = 487143459936. Its totient is φ = 81166535840.

The previous prime is 243535668721. The next prime is 243535668767. The reversal of 243535668738 is 837866535342.

243535668738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×243535668738³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2961156 + ... + 3042287.

It is an arithmetic number, because the mean of its divisors is an integer number (30446466246).

Almost surely, 2^243535668738 is an apocalyptic number.

243535668738 is an abundant number, since it is smaller than the sum of its proper divisors (243607791198).

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

243535668738 is a wasteful number, since it uses less digits than its factorization.

243535668738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010209.

The product of its digits is 87091200, while the sum is 60.

The spelling of 243535668738 in words is "two hundred forty-three billion, five hundred thirty-five million, six hundred sixty-eight thousand, seven hundred thirty-eight".