243117726320544 has 48 divisors (see below), whose sum is σ = 639176541911712. Its totient is φ = 80913209050368.

The previous prime is 243117726320543. The next prime is 243117726320591. The reversal of 243117726320544 is 445023627711342.

It is a happy number.

243117726320544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (243117726320543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1969204459 + ... + 1969327914.

It is an arithmetic number, because the mean of its divisors is an integer number (13316177956494).

Almost surely, 2^{243117726320544} is an apocalyptic number.

243117726320544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243117726320544 is an abundant number, since it is smaller than the sum of its proper divisors (396058815591168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243117726320544 is a wasteful number, since it uses less digits than its factorization.

243117726320544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938533029 (or 3938533021 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 51.

The spelling of 243117726320544 in words is "two hundred forty-three trillion, one hundred seventeen billion, seven hundred twenty-six million, three hundred twenty thousand, five hundred forty-four".