243645315794 has 16 divisors (see below), whose sum is σ = 368161822296. Its totient is φ = 120924835200.

The previous prime is 243645315791. The next prime is 243645315803. The reversal of 243645315794 is 497513546342.

It can be written as a sum of positive squares in 4 ways, for example, as 218495479225 + 25149836569 = 467435^2 + 158587^2 .

It is not an unprimeable number, because it can be changed into a prime (243645315791) 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, 5749604 + ... + 5791824.

Almost surely, 2^243645315794 is an apocalyptic number.

243645315794 is a deficient number, since it is larger than the sum of its proper divisors (124516506502).

243645315794 is a wasteful number, since it uses less digits than its factorization.

243645315794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63421.

The product of its digits is 10886400, while the sum is 53.

The spelling of 243645315794 in words is "two hundred forty-three billion, six hundred forty-five million, three hundred fifteen thousand, seven hundred ninety-four".