243733570656 has 48 divisors (see below), whose sum is σ = 640342665648. Its totient is φ = 81175692800.

The previous prime is 243733570649. The next prime is 243733570667. The reversal of 243733570656 is 656075337342.

243733570656 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 a junction number, because it is equal to n+sod(n) for n = 243733570599 and 243733570608.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 961515 + ... + 1188266.

It is an arithmetic number, because the mean of its divisors is an integer number (13340472201).

Almost surely, 2^243733570656 is an apocalyptic number.

It is an amenable number.

243733570656 is an abundant number, since it is smaller than the sum of its proper divisors (396609094992).

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

243733570656 is a wasteful number, since it uses less digits than its factorization.

243733570656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150975 (or 2150967 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 51.

The spelling of 243733570656 in words is "two hundred forty-three billion, seven hundred thirty-three million, five hundred seventy thousand, six hundred fifty-six".