243400255104 has 128 divisors (see below), whose sum is σ = 663133236480. Its totient is φ = 79065006080.

The previous prime is 243400255099. The next prime is 243400255141. The reversal of 243400255104 is 401552004342.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4176244 + ... + 4234124.

It is an arithmetic number, because the mean of its divisors is an integer number (5180728410).

Almost surely, 2^243400255104 is an apocalyptic number.

243400255104 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 243400255104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331566618240).

243400255104 is an abundant number, since it is smaller than the sum of its proper divisors (419732981376).

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

243400255104 is a wasteful number, since it uses less digits than its factorization.

243400255104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58178 (or 58166 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 243400255104 its reverse (401552004342), we get a palindrome (644952259446).

The spelling of 243400255104 in words is "two hundred forty-three billion, four hundred million, two hundred fifty-five thousand, one hundred four".