243578917040 has 40 divisors (see below), whose sum is σ = 566346608640. Its totient is φ = 97427158016.

The previous prime is 243578917037. The next prime is 243578917063. The reversal of 243578917040 is 40719875342.

243578917040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 243578917040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156696 + ... + 2266824.

It is an arithmetic number, because the mean of its divisors is an integer number (14158665216).

Almost surely, 2^243578917040 is an apocalyptic number.

243578917040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243578917040 is an abundant number, since it is smaller than the sum of its proper divisors (322767691600).

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

243578917040 is a wasteful number, since it uses less digits than its factorization.

243578917040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137789 (or 137783 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 243578917040 in words is "two hundred forty-three billion, five hundred seventy-eight million, nine hundred seventeen thousand, forty".