243344340657 has 24 divisors (see below), whose sum is σ = 384684700608. Its totient is φ = 147007183200.

The previous prime is 243344340647. The next prime is 243344340703. The reversal of 243344340657 is 756043443342.

243344340657 is a `hidden beast` number, since 243 + 3 + 4 + 4 + 340 + 65 + 7 = 666.

It is not a de Polignac number, because 243344340657 - 2¹⁶ = 243344275121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243344340637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3921018 + ... + 3982595.

It is an arithmetic number, because the mean of its divisors is an integer number (16028529192).

Almost surely, 2^243344340657 is an apocalyptic number.

It is an amenable number.

243344340657 is a deficient number, since it is larger than the sum of its proper divisors (141340359951).

243344340657 is a wasteful number, since it uses less digits than its factorization.

243344340657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7903941 (or 7903938 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 45.

Adding to 243344340657 its reverse (756043443342), we get a palindrome (999387783999).

The spelling of 243344340657 in words is "two hundred forty-three billion, three hundred forty-four million, three hundred forty thousand, six hundred fifty-seven".