243255543040 has 36 divisors (see below), whose sum is σ = 582673046004. Its totient is φ = 97302216704.

The previous prime is 243255543019. The next prime is 243255543059. The reversal of 243255543040 is 40345552342.

It can be written as a sum of positive squares in 2 ways, for example, as 160025601024 + 83229942016 = 400032^2 + 288496^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95020417 + ... + 95022976.

It is an arithmetic number, because the mean of its divisors is an integer number (16185362389).

Almost surely, 2^243255543040 is an apocalyptic number.

243255543040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243255543040 is an abundant number, since it is smaller than the sum of its proper divisors (339417502964).

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

243255543040 is an equidigital number, since it uses as much as digits as its factorization.

243255543040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190043414 (or 190043400 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

The spelling of 243255543040 in words is "two hundred forty-three billion, two hundred fifty-five million, five hundred forty-three thousand, forty".