243773798400 has 2304 divisors, whose sum is σ = 1105579238400. Its totient is φ = 51904512000.

The previous prime is 243773798393. The next prime is 243773798407. The reversal of 243773798400 is 4897377342.

It is an interprime number because it is at equal distance from previous prime (243773798393) and next prime (243773798407).

It is a tau number, because it is divible by the number of its divisors (2304).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243773798407) by changing a digit.

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, 5945702380 + ... + 5945702420.

It is an arithmetic number, because the mean of its divisors is an integer number (479852100).

Almost surely, 2^243773798400 is an apocalyptic number.

243773798400 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 243773798400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552789619200).

243773798400 is an abundant number, since it is smaller than the sum of its proper divisors (861805440000).

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

243773798400 is a wasteful number, since it uses less digits than its factorization.

243773798400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

It can be divided in two parts, 2437 and 73798400, that added together give a palindrome (73800837).

The spelling of 243773798400 in words is "two hundred forty-three billion, seven hundred seventy-three million, seven hundred ninety-eight thousand, four hundred".