243809783456 has 48 divisors (see below), whose sum is σ = 516567640680. Its totient is φ = 112853114880.

The previous prime is 243809783453. The next prime is 243809783471. The reversal of 243809783456 is 654387908342.

It can be written as a sum of positive squares in 4 ways, for example, as 162650890000 + 81158893456 = 403300^2 + 284884^2 .

It is a super-2 number, since 2×243809783456² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243809783395 and 243809783404.

It is not an unprimeable number, because it can be changed into a prime (243809783453) 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, 3640421 + ... + 3706788.

Almost surely, 2^243809783456 is an apocalyptic number.

It is an amenable number.

243809783456 is an abundant number, since it is smaller than the sum of its proper divisors (272757857224).

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

243809783456 is a wasteful number, since it uses less digits than its factorization.

243809783456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347297 (or 7347289 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 59.

The spelling of 243809783456 in words is "two hundred forty-three billion, eight hundred nine million, seven hundred eighty-three thousand, four hundred fifty-six".