243664645662344 has 8 divisors (see below), whose sum is σ = 456871210616910. Its totient is φ = 121832322831168.

The previous prime is 243664645662311. The next prime is 243664645662349. The reversal of 243664645662344 is 443266546466342.

It can be written as a sum of positive squares in only one way, i.e., 227661685525444 + 16002960136900 = 15088462^2 + 4000370^2 .

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

It is not an unprimeable number, because it can be changed into a prime (243664645662349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15229040353889 + ... + 15229040353904.

Almost surely, 2^{243664645662344} is an apocalyptic number.

It is an amenable number.

243664645662344 is a deficient number, since it is larger than the sum of its proper divisors (213206564954566).

243664645662344 is a wasteful number, since it uses less digits than its factorization.

243664645662344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30458080707799 (or 30458080707795 counting only the distinct ones).

The product of its digits is 1433272320, while the sum is 65.

The spelling of 243664645662344 in words is "two hundred forty-three trillion, six hundred sixty-four billion, six hundred forty-five million, six hundred sixty-two thousand, three hundred forty-four".