243263426436 has 18 divisors (see below), whose sum is σ = 614915883582. Its totient is φ = 81087808800.

The previous prime is 243263426429. The next prime is 243263426447. The reversal of 243263426436 is 634624362342.

243263426436 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 634 + 2 + 6 + 4 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 228812982336 + 14450444100 = 478344^2 + 120210^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 243263426391 and 243263426400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3378658665 + ... + 3378658736.

Almost surely, 2^243263426436 is an apocalyptic number.

It is an amenable number.

243263426436 is an abundant number, since it is smaller than the sum of its proper divisors (371652457146).

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

243263426436 is a wasteful number, since it uses less digits than its factorization.

243263426436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757317411 (or 6757317406 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 45.

Adding to 243263426436 its reverse (634624362342), we get a palindrome (877887788778).

The spelling of 243263426436 in words is "two hundred forty-three billion, two hundred sixty-three million, four hundred twenty-six thousand, four hundred thirty-six".