243427556944 has 160 divisors (see below), whose sum is σ = 558319265280. Its totient is φ = 101362060800.

The previous prime is 243427556909. The next prime is 243427556989. The reversal of 243427556944 is 449655724342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283384387 + ... + 283385245.

It is an arithmetic number, because the mean of its divisors is an integer number (3489495408).

Almost surely, 2^243427556944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243427556944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279159632640).

243427556944 is an abundant number, since it is smaller than the sum of its proper divisors (314891708336).

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

243427556944 is a wasteful number, since it uses less digits than its factorization.

243427556944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1683 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 55.

The spelling of 243427556944 in words is "two hundred forty-three billion, four hundred twenty-seven million, five hundred fifty-six thousand, nine hundred forty-four".