243387783342 has 128 divisors (see below), whose sum is σ = 593365893120. Its totient is φ = 73338138720.

The previous prime is 243387783337. The next prime is 243387783371.

It is a happy number.

243387783342 is nontrivially palindromic in base 10.

243387783342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243387783342² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 63 ways as a sum of consecutive naturals, for example, 113572323 + ... + 113574465.

It is an arithmetic number, because the mean of its divisors is an integer number (4635671040).

Almost surely, 2^243387783342 is an apocalyptic number.

243387783342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243387783342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296682946560).

243387783342 is an abundant number, since it is smaller than the sum of its proper divisors (349978109778).

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

243387783342 is a wasteful number, since it uses less digits than its factorization.

243387783342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155 (or 3149 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The spelling of 243387783342 in words is "two hundred forty-three billion, three hundred eighty-seven million, seven hundred eighty-three thousand, three hundred forty-two".