243661466465512 has 8 divisors (see below), whose sum is σ = 456865249622850. Its totient is φ = 121830733232752.

The previous prime is 243661466465491. The next prime is 243661466465539. The reversal of 243661466465512 is 215564664166342.

It can be written as a sum of positive squares in only one way, i.e., 233756762279236 + 9904704186276 = 15289106^2 + 3147174^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15228841654087 + ... + 15228841654102.

Almost surely, 2^{243661466465512} is an apocalyptic number.

It is an amenable number.

243661466465512 is a deficient number, since it is larger than the sum of its proper divisors (213203783157338).

243661466465512 is a wasteful number, since it uses less digits than its factorization.

243661466465512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30457683308195 (or 30457683308191 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 61.

The spelling of 243661466465512 in words is "two hundred forty-three trillion, six hundred sixty-one billion, four hundred sixty-six million, four hundred sixty-five thousand, five hundred twelve".