243443004367601 has 2 divisors, whose sum is σ = 243443004367602. Its totient is φ = 243443004367600.

The previous prime is 243443004367597. The next prime is 243443004367639. The reversal of 243443004367601 is 106763400344342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204060539320576 + 39382465047025 = 14284976^2 + 6275545^2 .

It is a cyclic number.

It is not a de Polignac number, because 243443004367601 - 2² = 243443004367597 is a prime.

It is not a weakly prime, because it can be changed into another prime (243443004367681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121721502183800 + 121721502183801.

It is an arithmetic number, because the mean of its divisors is an integer number (121721502183801).

Almost surely, 2^{243443004367601} is an apocalyptic number.

It is an amenable number.

243443004367601 is a deficient number, since it is larger than the sum of its proper divisors (1).

243443004367601 is an equidigital number, since it uses as much as digits as its factorization.

243443004367601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 47.

The spelling of 243443004367601 in words is "two hundred forty-three trillion, four hundred forty-three billion, four million, three hundred sixty-seven thousand, six hundred one".