243046213640 has 128 divisors (see below), whose sum is σ = 589450936320. Its totient is φ = 89928748800.

The previous prime is 243046213603. The next prime is 243046213673. The reversal of 243046213640 is 46312640342.

It is a self number, because there is not a number n which added to its sum of digits gives 243046213640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66934625 + ... + 66938255.

It is an arithmetic number, because the mean of its divisors is an integer number (4605085440).

Almost surely, 2^243046213640 is an apocalyptic number.

243046213640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243046213640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294725468160).

243046213640 is an abundant number, since it is smaller than the sum of its proper divisors (346404722680).

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

243046213640 is a wasteful number, since it uses less digits than its factorization.

243046213640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6043 (or 6039 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 243046213640 its reverse (46312640342), we get a palindrome (289358853982).

The spelling of 243046213640 in words is "two hundred forty-three billion, forty-six million, two hundred thirteen thousand, six hundred forty".