243990241906320 has 6400 divisors, whose sum is σ = 1229126450872320. Its totient is φ = 43387303034880.

The previous prime is 243990241906273. The next prime is 243990241906391. The reversal of 243990241906320 is 23609142099342.

243990241906320 is a `hidden beast` number, since 2 + 4 + 399 + 0 + 2 + 4 + 190 + 63 + 2 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 1279 ways as a sum of consecutive naturals, for example, 5674191672219 + ... + 5674191672261.

Almost surely, 2^{243990241906320} is an apocalyptic number.

243990241906320 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 243990241906320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614563225436160).

243990241906320 is an abundant number, since it is smaller than the sum of its proper divisors (985136208966000).

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

243990241906320 is a wasteful number, since it uses less digits than its factorization.

243990241906320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 243990241906320 in words is "two hundred forty-three trillion, nine hundred ninety billion, two hundred forty-one million, nine hundred six thousand, three hundred twenty".