243059256678 has 64 divisors (see below), whose sum is σ = 589048035840. Its totient is φ = 65271163392.

The previous prime is 243059256677. The next prime is 243059256689. The reversal of 243059256678 is 876652950342.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243059256677) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 291153 + ... + 755571.

It is an arithmetic number, because the mean of its divisors is an integer number (9203875560).

Almost surely, 2^243059256678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243059256678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294524017920).

243059256678 is an abundant number, since it is smaller than the sum of its proper divisors (345988779162).

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

243059256678 is a wasteful number, since it uses less digits than its factorization.

243059256678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465181.

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 243059256678 in words is "two hundred forty-three billion, fifty-nine million, two hundred fifty-six thousand, six hundred seventy-eight".