243005316635420 has 24 divisors (see below), whose sum is σ = 521168849296704. Its totient is φ = 95133996299456.

The previous prime is 243005316635381. The next prime is 243005316635513. The reversal of 243005316635420 is 24536613500342.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129258146207 + ... + 129258148086.

It is an arithmetic number, because the mean of its divisors is an integer number (21715368720696).

Almost surely, 2^{243005316635420} is an apocalyptic number.

243005316635420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243005316635420 is an abundant number, since it is smaller than the sum of its proper divisors (278163532661284).

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

243005316635420 is a wasteful number, since it uses less digits than its factorization.

243005316635420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258516294349 (or 258516294347 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 243005316635420 in words is "two hundred forty-three trillion, five billion, three hundred sixteen million, six hundred thirty-five thousand, four hundred twenty".