243438516823488 has 56 divisors (see below), whose sum is σ = 736111705636992. Its totient is φ = 69553861949184.

The previous prime is 243438516823441. The next prime is 243438516823531. The reversal of 243438516823488 is 884328615834342.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×243438516823488² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90564923070 + ... + 90564925757.

Almost surely, 2^{243438516823488} is an apocalyptic number.

243438516823488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243438516823488 is an abundant number, since it is smaller than the sum of its proper divisors (492673188813504).

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

243438516823488 is a wasteful number, since it uses less digits than its factorization.

243438516823488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181129848849 (or 181129848839 counting only the distinct ones).

The product of its digits is 849346560, while the sum is 69.

The spelling of 243438516823488 in words is "two hundred forty-three trillion, four hundred thirty-eight billion, five hundred sixteen million, eight hundred twenty-three thousand, four hundred eighty-eight".