243653568 has 56 divisors (see below), whose sum is σ = 678606720. Its totient is φ = 76942080.

The previous prime is 243653567. The next prime is 243653603. The reversal of 243653568 is 865356342.

243653568 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-2 number, since 2×243653568² = 118734122398261248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243653567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29748 + ... + 37043.

Almost surely, 2^243653568 is an apocalyptic number.

It is an amenable number.

243653568 is an abundant number, since it is smaller than the sum of its proper divisors (434953152).

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

243653568 is a wasteful number, since it uses less digits than its factorization.

243653568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66825 (or 66815 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 243653568 is about 15609.4063948633. The cubic root of 243653568 is about 624.5841013333.

The spelling of 243653568 in words is "two hundred forty-three million, six hundred fifty-three thousand, five hundred sixty-eight".