243113115688 has 8 divisors (see below), whose sum is σ = 455837091930. Its totient is φ = 121556557840.

The previous prime is 243113115659. The next prime is 243113115703. The reversal of 243113115688 is 886511311342.

It can be written as a sum of positive squares in only one way, i.e., 243086469444 + 26646244 = 493038^2 + 5162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15194569723 + ... + 15194569738.

Almost surely, 2^243113115688 is an apocalyptic number.

It is an amenable number.

243113115688 is a deficient number, since it is larger than the sum of its proper divisors (212723976242).

243113115688 is a wasteful number, since it uses less digits than its factorization.

243113115688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30389139467 (or 30389139463 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

It can be divided in two parts, 243113 and 115688, that added together give a square (358801 = 599²).

The spelling of 243113115688 in words is "two hundred forty-three billion, one hundred thirteen million, one hundred fifteen thousand, six hundred eighty-eight".