243284521816 has 32 divisors (see below), whose sum is σ = 521393940000. Its totient is φ = 104250802176.

The previous prime is 243284521813. The next prime is 243284521849. The reversal of 243284521816 is 618125482342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243284521813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135000 + ... + 710488.

It is an arithmetic number, because the mean of its divisors is an integer number (16293560625).

Almost surely, 2^243284521816 is an apocalyptic number.

It is an amenable number.

243284521816 is an abundant number, since it is smaller than the sum of its proper divisors (278109418184).

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

243284521816 is a wasteful number, since it uses less digits than its factorization.

243284521816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583051 (or 583047 counting only the distinct ones).

The product of its digits is 737280, while the sum is 46.

The spelling of 243284521816 in words is "two hundred forty-three billion, two hundred eighty-four million, five hundred twenty-one thousand, eight hundred sixteen".