243444342461 has 16 divisors (see below), whose sum is σ = 247468241664. Its totient is φ = 239448701184.

The previous prime is 243444342437. The next prime is 243444342509. The reversal of 243444342461 is 164243444342.

It is a cyclic number.

It is not a de Polignac number, because 243444342461 - 2⁶ = 243444342397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243444342431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18787961 + ... + 18800913.

It is an arithmetic number, because the mean of its divisors is an integer number (15466765104).

Almost surely, 2^243444342461 is an apocalyptic number.

It is an amenable number.

243444342461 is a deficient number, since it is larger than the sum of its proper divisors (4023899203).

243444342461 is a wasteful number, since it uses less digits than its factorization.

243444342461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020.

The product of its digits is 884736, while the sum is 41.

The spelling of 243444342461 in words is "two hundred forty-three billion, four hundred forty-four million, three hundred forty-two thousand, four hundred sixty-one".