243773397504 has 1920 divisors, whose sum is σ = 1003135795200. Its totient is φ = 57689210880.

The previous prime is 243773397499. The next prime is 243773397521. The reversal of 243773397504 is 405793377342.

243773397504 is a `hidden beast` number, since 2 + 4 + 37 + 73 + 39 + 7 + 504 = 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5186668009 + ... + 5186668055.

It is an arithmetic number, because the mean of its divisors is an integer number (522466560).

Almost surely, 2^243773397504 is an apocalyptic number.

243773397504 is a gapful number since it is divisible by the number (24) 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 243773397504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501567897600).

243773397504 is an abundant number, since it is smaller than the sum of its proper divisors (759362397696).

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

243773397504 is a wasteful number, since it uses less digits than its factorization.

243773397504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 54.

The spelling of 243773397504 in words is "two hundred forty-three billion, seven hundred seventy-three million, three hundred ninety-seven thousand, five hundred four".