204243648688 has 20 divisors (see below), whose sum is σ = 395729870328. Its totient is φ = 102119811200.

The previous prime is 204243648683. The next prime is 204243648701. The reversal of 204243648688 is 886846342402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (204243648683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036620 + ... + 1217812.

Almost surely, 2^204243648688 is an apocalyptic number.

It is an amenable number.

204243648688 is a deficient number, since it is larger than the sum of its proper divisors (191486221640).

204243648688 is a wasteful number, since it uses less digits than its factorization.

204243648688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251652 (or 251646 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 55.

The spelling of 204243648688 in words is "two hundred four billion, two hundred forty-three million, six hundred forty-eight thousand, six hundred eighty-eight".