243644426532 has 72 divisors (see below), whose sum is σ = 672340041464. Its totient is φ = 73940553216.

The previous prime is 243644426497. The next prime is 243644426671. The reversal of 243644426532 is 235624446342.

243644426532 is a `hidden beast` number, since 2 + 4 + 36 + 44 + 42 + 6 + 532 = 666.

243644426532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 65303758116 + 178340668416 = 255546^2 + 422304^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3531643 + ... + 3599970.

Almost surely, 2^243644426532 is an apocalyptic number.

It is an amenable number.

243644426532 is an abundant number, since it is smaller than the sum of its proper divisors (428695614932).

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

243644426532 is a wasteful number, since it uses less digits than its factorization.

243644426532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131709 (or 7131704 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 45.

The spelling of 243644426532 in words is "two hundred forty-three billion, six hundred forty-four million, four hundred twenty-six thousand, five hundred thirty-two".