243053140561 has 24 divisors (see below), whose sum is σ = 305364944192. Its totient is φ = 189366012000.

The previous prime is 243053140549. The next prime is 243053140601. The reversal of 243053140561 is 165041350342.

It is not a de Polignac number, because 243053140561 - 2⁷ = 243053140433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243053140501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8127286 + ... + 8157136.

Almost surely, 2^243053140561 is an apocalyptic number.

It is an amenable number.

243053140561 is a deficient number, since it is larger than the sum of its proper divisors (62311803631).

243053140561 is a wasteful number, since it uses less digits than its factorization.

243053140561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39493 (or 39482 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 243053140561 in words is "two hundred forty-three billion, fifty-three million, one hundred forty thousand, five hundred sixty-one".